(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Which colour of white light is deviated by a glass prism

1. the most and
2. the least?

How does the speed of light in glass change on increasing the wavelength of light?

What is the range of wavelength of the spectrum of white light in Å?

Calculate the frequency of yellow light of wavelength 550 nm. The speed of light is 3 × 10⁸ m/s^-1.

State the S.I. unit of current.

Define the term resistivity. 

At what voltage and frequency is the electric power generated at the power generating station?

Explain with the aid of a simple diagram, the transmission of electric power from the generating station to your house.

At what voltage is the electric power from the generating station transmitted? Give reason to your answer.

At what voltage is the a.c. supplied to our houses?

Name the device used to decrease the voltage at the substation for its supply.

1. Name the three connecting wires used in a household circuit.
2. Which of the two wires mentioned in part (a) are at the same potential?
3. In which of the wire stated in part (a) the switch is connected?

What is the pole fuse? Write down its current rating.

The electrical appliances in a house are connected in ______.

The rating of a fuse connected in the lighting circuit is:
(a) 15 A (b) 5 A (c) 10 A (d) Zero

A switch must be connected in:
(a) Live wire (b) neutral wire
(c) earth wire (d) either earth or neutral wire

Describe an experiment to demonstrate that there is a magnetic field around a current carrying conductor.

Find the potential difference required to pass a current of 0.2 A in a wire of resistance 20Ω

What will happen to a compass needle when the compass is placed below a wire with needle parallel to it and a current is made to flow through the wire? Give a reason to justify your answer.

A given wire of resistance 1 Ω is stretched to double its length. What will be its new resistance?