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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Differentiate between conductors and insulators.

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प्रश्न

Differentiate between conductors and insulators.

फरक स्पष्ट करा
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उत्तर

Sr. No. Conductors Insulators
1. Those substances through which electricity can flow are called conductors. Those substances through which electricity cannot flow are called insulators.
2. Electrical resistances of conductors are very low. Electrical resistances of insulators are infinitely very high.
3. They contain a large number of free electrons. They do not contain free electrons.
4. Generally, metals are conductors. E.g., silver, copper, aluminium. Generally, non-metals are insulators. E.g., wood, rubber, plastic.
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पाठ 2: Electrochemistry - VERY SHORT ANSWER TYPE QUESTIONS [पृष्ठ १९२]

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नूतन Chemistry [English] Class 12 ISC
पाठ 2 Electrochemistry
VERY SHORT ANSWER TYPE QUESTIONS | Q 1. | पृष्ठ १९२

संबंधित प्रश्‍न

The magnetic field inside a long straight solenoid-carrying current ______.


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


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


State the form of magnetic field lines around a straight current-carrying conductor.


State whether the following statement is true or false:
The magnetic field inside a long circular coil carrying current well be parallel straight lines.


What is the shape of a current-carrying conductor whose magnetic field pattern resembles that of a bar magnet?


Describe how you will locate a current-carrying wire concealed in a wall.


Name and state the rule to determine the direction of magnetic field around a straight current-carrying conductor.


 What are the various ways in which the strength of magnetic field produced by a current-carrying circular coil can be increased?


State and explain the Clock face rule for determining the polarities of a circular wire carrying current.


Name any two factors on which the strength of magnetic field produced by a current-carrying solenoid depends. How does it depend on these factors?


What is the shape of field lines inside a current-carrying solenoid? What does the pattern of field lines inside a current-carrying solenoid indicate?


What type of core should be put inside a current-carrying solenoid to make an electromagnet?


A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid:

(a) will decrease
(b) will increase
(c) will become zero
(d) will remain the same


A current-carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should passed in the conductor:

(a) from top towards bottom
(b) from left towards right
(c) from bottom towards top
(d) from right towards left 


State two ways to increase the force on a current-carrying conductor in a magnetic field.


The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is: 

 45°
 60°
 90°
 180°


The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is: 

 45°
 60°
 90°
 180°

 


Two coils A and B of insulated wire are kept close to each other. Coil A is connected to a galvanometer while coil B is connected to a battery through a key. What would happen if: 

a current is passed through coil B by plugging the key?  

Explain your answer mentioning the name of the phenomenon involved.

 


State condition when magnitude of force on a current carrying conductor placed in a magnetic field is maximum?


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


When do you use (i) Fleming's left hand rule, and (ii) Fleming's right hand rule?

A flat coil ABCD is freely suspended between the pole of a U-shaped permanent magnet with the plane of coil parallel to the magnetic field. 

When will coil come to rest?


The following diagram shows two parallel straight conductors carrying the same current. Copy the diagram and draw the pattern of the magnetic field lines around them showing their directions. What is the magnitude of the magnetic field at a point 'X' which is equidistant from the conductors? Give justification for your answer.


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


Write Fleming’s left hand rule.


A current-carrying conductor is held in an exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor:


The shape of the magnetic field lines produced by a current-carrying conductor is ____________.


When current is parallel to a magnetic field, then force experience by the current-carrying conductor placed in a uniform magnetic field is ____________.


The direction of force on a current carrying conductor in a magnetic field is given by ____________.


The diagram below shows a free conductor AB is kept in a magnetic field and is carrying current from A to B. (To avoid confusion complete path of the circuit is not shown) The direction of the force experienced by the conductor will be:


For a current in a long straight solenoid N- and S-poles are created at the two ends. Among the following statements, the incorrect statement is


Two LED bulbs of 10W and 5W are connected in series. If the current flowing through 5W bulb is 0.005A, the current flowing through 10W bulb is ______.


If the strength of the current flowing through a wire is increased, the strength of the magnetic field produced by it ______.


The graph (fig A) illustrates the correlation between the number of protons (x-axis) and the number of neutrons (y-axis) for elements A, B, C, D, and E in the periodic table. These elements are denoted by the letters rather than their conventional symbols. When the element C, depicted in the graph, undergoes radioactive decay, it releases radioactive rays. When these rays are directed into the plane of the paper in the presence of a magnetic field, as indicated in the fig B, they experience deflection, causing them to move upwards.

Name the law used to identify the radioactive radiation emitted by the element.


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