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

The device used for measuring potential difference is

A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.

Define the following:

Potential difference

What is the combined resistance of each of the networks between A and B shown in fig. ?

The voltage across a 3Ω resistance is 6 V. How large is the current? What is
the resistance of a filament lamp when a voltage of 3 V across it causes a
current of 0.5 A?

A lens forms the image of an object placed at a distance of 45 cm from it on a screen placed at a distance 90 cm on the other side of it. Name the kind of lens.

How will you differentiate between a convex and a concave lens by looking at  a distant object.

How will you differentiate between a convex and a concave lens by looking at a printed page?

The wavelengths of violet and red light are 4000 Å and 8000 Å respectively. Which of the two has the higher frequency?

The wavelength range of white light is ______.

A wave has wavelength 50Å of name the wave.

A wave has wavelength 50Å of State the speed in vacuum.

A wave has wavelength 50Å of State its one use.

What are mechanical waves?

What do you mean by reflection of sound? State one condition for the reflection of a sound wave. Name a device in which reflection of sound wave is used.

State whether the potential is a scalar or vector?

Calculate the current flowing through each of the resistors A and B in the circuit shown in the following figure.