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

(a) Calculate the total resistance across AB.

(b) If a cell of e.m.f 2.4 V with negligible internal resistance is connected across AB then calculate the current drawn from the cell.

(a) Observe the diagram given below and state whether the bulb will glow or not when we switch on K.

(b) Is it safe to handle the bulb when the switch is OFF?

(c) Give a reason for your answer in (b).

An electric bulb is rated ‘240 V, 100 W’.

1. What information can you get from the above statement?
2. What will happen if this bulb is connected across 220 V?
3. Calculate the resistance of the bulb.
4. Also find the energy consumed by the bulb in 10 minutes.

When a current I flows through a wire of resistance R for time t then the electrical energy produced is given by ______.

Choose the correct relation for e.m.f. (ε) and terminal voltage V:

'A geyser is rated 240 W-220 V'. Explain the meaning of this statement.

Find the value of current I drawn from the cell.

1. Calculate the current I.
2. Calculate the terminal voltage.

The potential difference between terminals of a cell in a closed electric circuit is ______.

Sumit does 600 J of work in 10 min and Amit does 300 J of work in 20 min. Calculate the ratio of the powers delivered by them.

1. Resistance
2. Intensity of light

A fuse is rated 5 A. Can it be used with a geyser rated 1540 W, 220 V Write Yes or No. Give supporting calculations to justify your answer.

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?