# NCERT solutions for Class 10 Science chapter 13 - Magnetic Effects of Electric Current [Latest edition]

#### Chapters ## Chapter 13: Magnetic Effects of Electric Current

[Page 228]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Page 228]

Q 1 | Page 228

Draw magnetic field lines around a bar magnet.

Q 3 | Page 228

Why don’t two magnetic lines of force intersect each other?

[Pages 229 - 230]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Pages 229 - 230]

Q 1 | Page 229

Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop

Q 2 | Page 229

The magnetic field in a given region is uniform. Draw a diagram to represent it.

Q 3 | Page 230

The magnetic field inside a long straight solenoid-carrying current

• is zero

• decreases as we move towards its end

• increases as we move towards its end

• is the same at all points

[Pages 231 - 232]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Pages 231 - 232]

Q 1 | Page 231

Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)
(a) mass
(b) speed
(c) velocity
(d) momentum

Q 2 | Page 232

In Activity shown below, how do we think the displacement of rod AB will be affected if (i) current in rod AB is increased: (ii) a stronger horse-shoe magnet is used: and (iii) length of the rod AB is increased? Q 3 | Page 232

A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is

• towards south

• towards east

• downward

• upward

[Page 233]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Page 233]

Q 1 | Page 233

State Fleming’s left-hand rule.

Q 2 | Page 233

What is the principle of an electric motor?

Q 3 | Page 233

What is the role of the split ring in an electric motor?

[Page 236]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Page 236]

Q 1 | Page 236

Explain different ways to induce current in a coil.

[Page 237]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Page 237]

Q 1 | Page 237

State the principle of an electric generator.

Q 2 | Page 237

Name some sources of direct current.

Q 3 | Page 237

Which sources produce alternating current?

Q 4 | Page 237

A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each

• two revolutions

• one revolution

• half revolution

• one-fourth revolution

[Page 238]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Page 238]

Q 1 | Page 238

Name safety measures commonly used in electric circuits and appliances.

Q 2 | Page 238

An electric oven of 2 kW is operated in a domestic electric circuit (220 V) that has a current rating of 5 A. What result do you expect? Explain.

Q 3 | Page 238

What precaution should be taken to avoid the overloading of domestic electric circuits?

[Pages 240 - 241]

### NCERT solutions for Class 10 Science Chapter 13 Magnetic Effects of Electric Current [Pages 240 - 241]

Q 1 | Page 240

Which of the following correctly describes the magnetic field near a long straight wire?

• The field consists of straight lines perpendicular to the wire

• The field consists of straight lines parallel to the wire

• The field consists of radial lines originating from the wire

• The field consists of concentric circles centred on the wire

Q 2 | Page 240

The phenomenon of electromagnetic induction is

• the process of charging a body

• the process of generating magnetic field due to a current passing through a coil

• producing induced current in a coil due to relative motion between a magnet and the coil

• the process of rotating a coil of an electric motor

Q 3 | Page 240

The device used for producing electric current is called a

• generator

• galvanometer

• ammeter

• motor

Q 4 | Page 240

The essential difference between an AC generator and a DC generator is that

• AC generator has an electromagnet while a DC generator has permanent magnet.

• DC generator will generate a higher voltage.

• AC generator will generate a higher voltage.

• AC generator has slip rings while the DC generator has a commutator.

Q 5 | Page 240

At the time of short circuit, the current in the circuit

• reduces substantially

• does not change

• increases heavily

• vary continuously

Q 6.1 | Page 240

State whether the following statement is true or false.

An electric motor converts mechanical energy into electrical energy.

• True

• False

Q 6.2 | Page 240

State whether the following statement is true or false.

An electric motor converts mechanical energy into electrical energy.

• True

• False

Q 6.3 | Page 240

State whether the following statement is true or false

The field at the centre of a long circular coil carrying current will be parallel straight lines

• True

• False

Q 6.4 | Page 240

State whether the following statement is true or false.

A wire with a green insulation is usually the live wire of an electric supply.

• True

• False

Q 7 | Page 240

List two methods of producing magnetic fields.

Q 8 | Page 241

How does a solenoid behave like a magnet? Can you determine the north and south poles of a current-carrying solenoid with the help of a bar magnet? Explain.

Q 9 | Page 241

When is the force experienced by a current-carrying conductor placed in a magnetic field largest?

Q 10 | Page 241

Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?

Q 11.1 | Page 241

Draw figure ‘Electric motor’ and working

Q 11.2 | Page 241

Principle of Electric motor

Q 11.3 | Page 241

What is the function of a split ring in an electric motor?

Q 12 | Page 241

Name some devices in which electric motors are used

Q 13 | Page 241

A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is (i) pushed into the coil, (ii) withdrawn from inside the coil, (iii) held stationary inside the coil?

Q 14 | Page 241

Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give reason.

Q 15.1 | Page 241

State the rule to determine the direction of a magnetic field produced around a straight conductor-carrying current

Q 15.2 | Page 241

State the rule to determine the direction of a force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it

Q 15.3 | Page 241

State the rule to determine the direction of a current induced in a coil due to its rotation in a magnetic field

Q 16 | Page 241

Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes?

Q 17 | Page 241

What happens to the flow of electric current during a short circuit?

Q 18 | Page 241

What is the function of an earth wire? Why is it necessary to earth metallic appliances?

## Chapter 13: Magnetic Effects of Electric Current ## NCERT solutions for Class 10 Science chapter 13 - Magnetic Effects of Electric Current

NCERT solutions for Class 10 Science chapter 13 (Magnetic Effects of Electric 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 CBSE Class 10 Science 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. NCERT 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 Science chapter 13 Magnetic Effects of Electric Current are Magnetic Field Lines, Magnetic Effect of Electric Current, Rule to Find the Direction of Magnetic Field, Magnetic Field Due to Current in a Loop (Or Circular Coil), Magnetic Field Due to a Current Carving Cylindrical Coil (or Solenoid), Force on a Current Carrying Conductor in a Magnetic Field, Magnetic Field, Electric Motor, Electromagnetic Induction, Alternating Current (A.C.) Generator, Domestic Electric Circuits, Types of current: Alternating Current (A.C.) and Direct Current (D.C.), Direct Current Motor, Distinction Between an A.C. Generator and D.C. Motor, Magnetic Field Due to a Current Carrying Straight Conductor, Faraday's Laws of Electromagnetic Induction, Magnetic Field Lines, Magnetic Effect of Electric Current, Rule to Find the Direction of Magnetic Field, Magnetic Field Due to Current in a Loop (Or Circular Coil), Magnetic Field Due to a Current Carving Cylindrical Coil (or Solenoid), Force on a Current Carrying Conductor in a Magnetic Field, Magnetic Field, Electric Motor, Electromagnetic Induction, Alternating Current (A.C.) Generator, Domestic Electric Circuits, Types of current: Alternating Current (A.C.) and Direct Current (D.C.), Direct Current Motor, Distinction Between an A.C. Generator and D.C. Motor, Magnetic Field Due to a Current Carrying Straight Conductor, Faraday's Laws of Electromagnetic Induction.

Using NCERT Class 10 solutions Magnetic Effects of Electric 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 NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 10 prefer NCERT Textbook Solutions to score more in exam.

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