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

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.

Write an expression for the electrical power spent in flow of current through a conductor in terms of resistance and potential difference.

Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.

State the principle of an ideal machine.

Point out two differences between e.m.f. and potential difference as applied to electric circuits.

Explain why potential difference is always less than the e.m.f. of a cell?

What do you understand by the resistance of a wire?