Advertisement Remove all ads

ICSE solutions for Class 10 Physics chapter 9 - Magnetic Effect of Current [Latest edition]

Chapters

Class 10 Physics - Shaalaa.com
Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

Chapter 9: Magnetic Effect of Current

Short AnswersLong AnswersFigure Based Short AnswersFigure Based Long AnswersShort Numericals
Advertisement Remove all ads
Short Answers

ICSE solutions for Class 10 Physics Chapter 9 Magnetic Effect of CurrentShort Answers

Short Answers | Q 1.1

State whether a magnetic field is associated or not around a static charge.

Short Answers | Q 1.2

State whether a magnetic field is associated or not around a moving charge.

Short Answers | Q 1.3

State whether a magnetic field is associated or not around a current carrying conductor.

Short Answers | Q 2

What is the nature of the lines of force of the magnetic field due to a straight current carrying wire?

Short Answers | Q 3

What will happen to a compass needle when the compass is placed below a wire and a current is made to flow through the wire? Give a reason to justify your answer.

Short Answers | Q 4

State two factors on which the strength of induced e. m.f. depends.

Short Answers | Q 5

Describe briefly one way of producing an induced current in a coil. State one factor that determines the magnitude of induced e.m.f.

Short Answers | Q 6

State the two properties of the magnetic lines of force around a circular coil.

Short Answers | Q 7

A straight wire is held vertical and current is passed in it in the upward direction. A compass needle is kept near the wire in north of it. How is the needle deflected? What is the change in the deflection of the needle if the current in wire is reversed?

Short Answers | Q 8

Describe a simple Experiment to demonstrate that there Exists a magnetic field around a current-carrying conductor. 

Short Answers | Q 9

State a law, which determines the direction of magnetic field around a current carrying wire.

Short Answers | Q 10

A straight current-carrying conductor is kept in a magnetic field. It Experiences a force. State three factors on which the magnitude of force Experienced by the conductor depends. Under what condition will the conductor Experience no force?

Short Answers | Q 11.1

State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be maximum.

Short Answers | Q 11.2

State under what conditions force acting on a current carrying conductor which is freely suspended in a magnetic field can be Zero.

Short Answers | Q 12

State the purpose of the iron core.

Short Answers | Q 13

How does a magnetic field set up by a solenoid change when number of turns are increased?

Short Answers | Q 14

How does a magnetic field set up by a solenoid change when cross-sectional area of solenoid is increased?

Short Answers | Q 15

How does a magnetic field set up by a solenoid change when a soft iron core is inserted inside solenoid?

Short Answers | Q 16

How does a magnetic field set up by a solenoid change when strength of current in the solenoid is decreased?

Short Answers | Q 17

State two ways by which the magnetic field due to a solenoid can be made stronger.

Short Answers | Q 18

Why is soft iron generally used as the core of the electromagnet?

Short Answers | Q 19

Name two factors on which the magnitude of an induced e.m.f. in the
secondary coil depends.

Short Answers | Q 20

What is an electromagnet? List any two uses.

Short Answers | Q 21

State the condition when an electric charge can give rise to a magnetic field.

Short Answers | Q 22

List some of the practical applications of an electromagnet.

Short Answers | Q 23

What is a permanent magnet? Give one use of it.

Short Answers | Q 24

State two advantages of an electromagnet over a permanent magnet.

Short Answers | Q 25

State two advantages of an electromagnet over a bar magnet.

Short Answers | Q 26

What will be the effect on the working of an electric bell if instead of a direct current an alternating current is used?

Short Answers | Q 27

Name a common device that uses electromagnets.

Short Answers | Q 28

Name the material used for making the armature of an electric bell. Give a reason for your answer.

Short Answers | Q 29

What is an electric motor? State its principle.

Short Answers | Q 30

State three factors which govern the speed of rotation of an electric motor.

Short Answers | Q 31

How will the direction of force be changed, if the current is reversed in the conductor placed in a magnetic field?

Short Answers | Q 32

State the unit of magnetic field in terms of the force experienced by a current carrying conductor placed in a magnetic field

Short Answers | Q 33

What energy conversion takes place during the working of a d c motor?

Short Answers | Q 34

State the factors that can increase the speed of rotation of the coil in a D.C. motor.

Short Answers | Q 35

State the energy change that takes’place in a D. C. motor.

Short Answers | Q 36

State the principle of a D. C. motor.

Short Answers | Q 37.1

State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting an the coil is maximum.

Short Answers | Q 37.2

State the position of armature coil relative to the direction of magnetic field, in a D. C. motor when the deflecting couple acting and the coil is minimum.

Short Answers | Q 38

What is electromagnetic induction?

Short Answers | Q 39

State Lenz's Law.

Short Answers | Q 40

What is dynomo (a.c. generator)? State the principle on which it works.

Short Answers | Q 41

Suggest two ways in an a.c. generator to produce a higher e.m.f.

Short Answers | Q 42

What is a transformer? On what principle does it work?

Short Answers | Q 43

How are the e.m.f in the primary and secondary coils of a transformer related with the number of turns in these coils?

Short Answers | Q 44

What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?

Short Answers | Q 45

State the principle of a transformer.

Short Answers | Q 46

Can a transformer be used with direct current source? Give reason.

Short Answers | Q 47

State the factors on which the frequency of the alternating e.m.f. depends.

Short Answers | Q 48

Name the principle on which functioning of a transformer depends.

Short Answers | Q 49

What is the function of a step-up transformer?

Short Answers | Q 50

 Can a transformer work when it is connected to a D.C. source? Give a reason.

Short Answers | Q 51

Why is the core of a transformer made of soft iron?

Short Answers | Q 52

What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?

Short Answers | Q 53

Why is the core of a transformer laminated?

Short Answers | Q 54

What energy conversion does take place in a generator when it is in use?

Short Answers | Q 55

The primary windings of a step-up transformer are usually made of thicker wire than the secondary. Explain.

Long Answers

ICSE solutions for Class 10 Physics Chapter 9 Magnetic Effect of CurrentLong Answers

Long Answers | Q 1

State important properties (or characteristics) of magnetic lines of force around a straight conductor.

Long Answers | Q 2

Name and state the law which determines the direction of induced current.

or

State Fleming’s right-hand rule.

Long Answers | Q 3

State the factors, on which depends the magnitude of the force acting on current carrying conductor, when it is kept in a magnetic field perpendicular to it.

Long Answers | Q 4

A current-carrying solenoid is suspended so as to freely rotate in a horizontal plane. State in what direction will it rest. Give a reason for your answer.

or

When a solenoid that is carrying current is freely suspended, it comes to rest in a particular direction. Why does this happen?

Long Answers | Q 5

What are the factors that govern the magnitude of force acting on a current carrying conductor which is freely suspended in a magnetic field?

Long Answers | Q 6

Name two factors on which the strength of magnetic field of an electromagnet depends and state how does it depend on the factors stated by you.

Long Answers | Q 7

Point out three differences between an electromagnet and a bar (or permanent) magnet.

Long Answers | Q 8

Why soft iron is preferred to be used as the core of the electromagnet of an electric bell?

Long Answers | Q 9

State Fleming's left hand rule.

Long Answers | Q 10

Name three losses of energy in a transformer. How are they minimized?

Long Answers | Q 11

State Faraday’s law of electromagnetic induction.

Figure Based Short Answers

ICSE solutions for Class 10 Physics Chapter 9 Magnetic Effect of CurrentFigure Based Short Answers

Figure Based Short Answers | Q 1

State and explain ‘Ampere’s Swimming Rule’ to determine the direction of magnetic field (or magnetic lines of force) around a current carrying conductor.

Figure Based Short Answers | Q 2

The diagram shows a current-carrying coil passing through a cardboard sheet. Draw three magnetic lines of force on the board.

State two factors on which magnitude of magnetic field at the centre depends.

Figure Based Short Answers | Q 3

Sketch the lines of force of the magnetic field of a solenoid. How does its field compare with that of a bar magnet?

Figure Based Short Answers | Q 4

In the diagram XY is a straight conductor carrying current in the direction marked by the arrow. The conductor is held vertical by passing it through a horizontal cardboard sheet.

Draw three magnetic lines of force on the board and mark the direction of magnetic field in your diagram. State two factors on which magnitude of magnetic field at a point, depends.

Figure Based Short Answers | Q 5

State and explain Maxwell’s Cork Screw Rule.

Figure Based Short Answers | Q 6

State Fleming's left hand rule.

Figure Based Short Answers | Q 7

(i) A straight wire conductor passes vertically through a piece of cardboard sprinkled with iron filings. Copy the diagram and show the setting of iron filings when a current is passed through the wire in the upward direction and the cardboard is tapped gently. Draw arrows to represent the direction of the magnetic field lines.

(ii) Name the law which helped you to find the direction of the magnetic field lines.

Figure Based Short Answers | Q 8

State and illustrate the rule used for finding the polarity of the faces of a circular coil.

Figure Based Short Answers | Q 9

A flat coil of wire rotates at a constant speed about an axis perpendicular to a uniform magnetic field. Draw a graph to show how the induced e.m.f. varies relative to the positions of the coil during its one complete rotation. At what position of the coil, the e.m.f. has the maximum value?

Figure Based Short Answers | Q 10

The adjacent diagram shows a small magnet placed near a solenoid. State whether the magnet is attracted or repelled, as the switch is pressed. Give a reason.

Figure Based Short Answers | Q 11

What is a solenoid? Why do we usually keep its diameter small in comparison to its length?

Figure Based Short Answers | Q 12

What is an electromagnet? What do you know about the simplest form of an electromagnet?

Figure Based Short Answers | Q 13

Draw a labelled diagram to make an electromagnet from a soft iron bar. Mark the polarity at its ends in your diagram. What precaution would you observe while making it?

Figure Based Short Answers | Q 14

You have been provided with a solenoid AB.

(i) What is the polarity at end A?
(ii) Give one advantage of an electromagnet over a permanent magnet.

Figure Based Short Answers | Q 15

State the function of a split ring in D.C. motor.

Figure Based Short Answers | Q 16

Draw a neat labeled diagram of an A.C. generator 

Figure Based Short Answers | Q 17

State change that you would make to convert an A.C. generator into a D.C. generator. Illustrate the change by a diagram.

Figure Based Short Answers | Q 18

Draw a labelled diagram to show the various parts of a step-up transformer and step down transformer.

Figure Based Short Answers | Q 19

(i) Draw a clear labelled diagram of an electric bell.
(ii) Explain in brief, its working.
(iii) What material is used for the core of an electric bell? State the reason.

Figure Based Long Answers

ICSE solutions for Class 10 Physics Chapter 9 Magnetic Effect of CurrentFigure Based Long Answers

Figure Based Long Answers | Q 1

Describe a set up for plotting the magnetic lines of force in:  (i) A straight wire, (ii) A circular coil and (iii) A straight solenoid.

Figure Based Long Answers | Q 2

Describe an experiment to show that there is a magnetic field around a current carrying conductor.

Figure Based Long Answers | Q 3

The diagram shows a rectangular coil ABCD, suspended freely between the concave pole pieces of a permanent horseshoe magnet, such that the plane of the coil is parallel to the magnetic field.

(i) State your observation, when current is switched on.
(ii) Give an explanation for your observation in (i).
(iii) State the rule, which will help you to find the motion of rotation of coil.
(iv) In which position will the coil ultimately come to rest?
(v) State four ways of increasing the magnitude of force acting on the coil.

Figure Based Long Answers | Q 4

The given figures 1 to 3 show the working of a simple A.C. generator. Study the diagrams and answers of the following questions.

(i) State and explain the principle underlying the working of a simple generator.
(ii) Where is the loop of wire placed?
(iii) What happens when the loop is rotated?
(iv) Indicate the direction of the current flow through the wire for the first half of the turn (in first figure). Name and state the rule used in finding the direction of the current.
(v) Indicate the direction of the current for the case shown in second figure. 
(vi) Indicate the direction of current in the outer circuit (i.e., electric bulb) in first and third figure.
(vii) What type of current is shown in the above diagrams? Explain.

Figure Based Long Answers | Q 5

Copy the given diagram of a transformer and complete it. Name the parts A and B. Name the part you have drawn to complete the diagram. What is the material of this part? Is this transformer a step-up or step-down? Give reason.

Figure Based Long Answers | Q 6

The power supply to the primary coil of a transformer is 200 W. Find
(i) Current in primary coil if the e.m.f. supply to it is equal to 220V.
(ii) The number of turns in the primary coil is equal to 80 and that in secondary is 800. What is the transformation ratio?
(iii) Name the type of transformer.
(iv) What will be the output voltage?
(v) What is the current in the secondary coil for an ideal transformer?
(vi) What is the output power?
(vii) Is output and input power equal?
(viii) Compare the current flowing in a secondary coil and in a primary coil.

Short Numericals

ICSE solutions for Class 10 Physics Chapter 9 Magnetic Effect of CurrentShort Numericals

Short Numericals | Q 1

The primary coil of a transformer has 200 turns while the secondary coil has 1000 turns. What type of transformer is this? if the input voltage is 10V, what will be the output voltage?

Short Numericals | Q 2

Applying e.m. f to primary coil is 210 V. If the number of turns in primary coil is 200 turns and that of in secondary coil is 20 turns, then find out the output voltage. Name the type of transformer.

Short Numericals | Q 3

A transformer lowers e.m.f. 220 V to 12 volts. If the number of turns in primary are 8800, how many turns are in secondary coil?

Short Numericals | Q 4

A transformer lowers e.m.f. from 220 V to 15 V. If 400 W power is given in primary, calculate (i) the current in primary coil and (ii) the current in secondary coil.

Short Numericals | Q 5

A transformer lowers e.m.f. from 220 V to 15 V. If the number of turns in primary are 3520, how many turns are in the secondary coil?

Chapter 9: Magnetic Effect of Current

Short AnswersLong AnswersFigure Based Short AnswersFigure Based Long AnswersShort Numericals
Class 10 Physics - Shaalaa.com

ICSE solutions for Class 10 Physics chapter 9 - Magnetic Effect of Current

ICSE solutions for Class 10 Physics chapter 9 (Magnetic Effect of Current) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Class 10 Physics solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. ICSE textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 10 Physics chapter 9 Magnetic Effect of Current are Effects of Electric Current, Magnetic Effect of Electric Current, Magnetic Field Due to a Current Carrying Straight Conductor, Magnetic Field Due to Current in a Loop (Or Circular Coil), Electromagnet, Rule to Find the Direction of Magnetic Field, Making of an Electromagnet, Magnetic Field Due to a Current Carving Cylindrical Coil (or Solenoid), Permanent Magnet and Electromagnet, Applications of Electromagnets, Direct Current Motor, Electromagnetic Induction, Faraday's Laws of Electromagnetic Induction, Force on a Current Carrying Conductor in a Magnetic Field, Alternating Current (A.C.) Generator, Distinction Between an A.C. Generator and D.C. Motor, Types of current: Alternating Current (A.C.) and Direct Current (D.C.), Transformer, Types of Transformer.

Using ICSE Class 10 solutions Magnetic Effect of Current exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in ICSE Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 10 prefer ICSE Textbook Solutions to score more in exam.

Get the free view of chapter 9 Magnetic Effect of Current Class 10 extra questions for Class 10 Physics and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×