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

The voltage - current readings of a certain material are shown in the table given below:

Study the table.

1. State whether the conductor used is ohmic or non-ohmic.
2. Justify your answer.
3. State Ohm's law.

Study the diagram:

1. Calculate the total resistance of the circuit.
2. Calculate the current drawn from the cell.
3. State whether the current through 10 Ω resistor is greater than, less than or equal to the current through the 12 Ω resistor.

The graph of voltage vs current for four different materials is shown below.

Which of these four materials would be used for making filament of bulb?

Observe the given circuit diagram and answer the questions that follow:

1. Calculate the resistance of the circuit when the key K completes the circuit.
2. Calculate the current through 3Ω resistance when the circuit is complete.

Name the color code of the wire which is connected to the metallic body of an appliance.

Draw the diagram of a dual control switch when the appliance is switched ‘ON’.

Explain the meaning of the student 'current rating of a fuse is 5A'.

In the transmission of power the voltage of power generated at the generating stations is stepped up from 11kV to 132 kV before it is transmitted. Why?

State the characteristics required in a material to be used as an effective fuse wire.

At what voltage is this current available to our household?

For a fuse, higher the current rating ________ is the fuse wire.

Name the device used to increase the voltage at a generating station.

Name the wire in a household electrical circuit to which the switch is connected

Identify the following wires used in a household circuit: The wire is also called as the phase wire.

Identify the following wires used in a household circuit: The wire is connected to the top terminal of a three pin socket.

A fuse is rated 8A. Can it be used with an electrical appliance rated 5 KW, 200 V ? Give a reason.

An electric iron is rated 220V, 2kW.

1) if the iron is used for 2h daily find the cost of running it for one week if it costs 4.25 per kWh

2) Why is the fuse absolutely necessary in a power circuit?

(i) Write one advantage of connecting electrical appliances in parallel combination. 
(ii) What characteristics should a fuse wire have ?
(iii) Which wire in a power circuit is connected to the metallic body of the appliance ?

The diagram below shows a dual control switch circuit connected to a bulb. 

(i) Copy the diagram and complete it so that the bulb is switched ON.
(ii) Out of A and B which one is the live wire and which one is the neutral wire ?

Which one of the following statements is correct?