(English Medium) ICSE Class 10 - CISCE Important Questions for Physics

(a) Name the electrical appliance shown in the diagram below.

(b) Name the material of the wire used in this device.

(c) Name two important characteristics of this wire.

Which electrical component protects the electric circuit in case of excess current and which can also be used as a switch?

Name the wire to which this electrical component is connected in an electric circuit. 

Identify the option that displays the correct wiring with correct colour code:

If live wire makes an accidental contact with the metal case, which circuit (A or B) in the diagram, illustrating an electric iron, is considered safe for the user (Assuming the fuse is present in the live wire in both circuits)? Justify your answer.

Which coil of a step up transformer is made thicker and why?

Name the transformer used in the power transmitting station of a power plant.

What type of current is transmitted from the power station?

On reversing the direction of the current in a wire, the magnetic field produced by it gets ______.

Why does a current carrying, freely suspended solenoid rest along a particular direction?

State the direction in which current-carrying freely suspended solenoid rests

Give two similarities an AC generator and a DC motor

Name a common device that uses electromagnets.

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

In the following diagram an arrow shows the motion of the coil towards the bar magnet.
(1) State in which direction the current flows, A to B or B to A?
(2) Name the law used to come to the conclusion.

How is the e.m.f. across primary and secondary coils of a transformer related with the number of turns of the coil in them?

On which type of current do transformers work?

State any two advantages of electromagnets over permanent magnets.

The diagram shows a coil wound around a U shape soft iron bar AB.

1) What is the polarity induced at the ends A and B when the switch is pressed?

2) Suggest one way to strengthen the magnetic field in the electromagnet

3) What will be the polarities at A & B if the direction of current is reversed in the circuit?

State two ways to increase the speed of rotation of a D.C. motor.