A current carrying solenoid when freely suspended, it always rests in direction.

(Choose from north-south/east-west)

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Important Questions on Electro-Magnetism

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 19

You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. (a) Draw a circuit diagram to represent the process. (b) Label the poles of the electromagnet.

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 20

The below diagram shows a coil would around a soft iron bar XY.

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(a) State the polarity at the end X and Y as the switch is pressed.

(b) Suggest one way increasing the strength of electromagnet so formed.

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 21

(a) What name is given to a cylindrical coil of diameter less than its length? (b) If a piece of soft iron is placed inside the coil mentioned in part (a) and current is passed in the coil from a battery, what name is then given to the device so obtained? (c) Give one use of the device mentioned in part (b).

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 22

Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.

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10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 23

What is an electromagnet ? 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.

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IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 10 - Electro-Magnetism>EXERCISE-10(A)>Q 24

The figure given below, shows the current flowing in the coil of wire wound around the soft iron horse shoe core. State the polarities developed at the ends A and B.
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