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

How should the several electric lamps be connected with the mains so that the switching on or off a lamp has no effect on the operation of other lamps?

Two sets A and B of four bulbs each are glowing in two separate rooms. When one of the bulbs in set A is fused, the other three bulbs also cease to glow. But in set B, when one bulb fuses, the other bulbs continue to glow. Explain the difference in the two sets.

The electric meter in a house records the consumption of ______.

Draw a diagram showing the directions of three magnetic field lines due to a straight wire carrying current. Also show the direction of current in the wire.

How is the magnetic field due to a straight current carrying wire affected if current in wire is decreased?

How is the magnetic field due to a straight current carrying wire affected if current in wire is reversed?

A ray of light A incident from air suffers partial reflection and refraction at the boundary of water. 

1. Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C.
2. How are the angles of incidence i and refraction r related?

A small air bubble in a glass block when seen from above appears to be raised because of ______.

A force F acts on a body and displaces it by a distance S in a direction at an angle θ  with the direction of force.

What should be the angle between force and displacement so that the work done is

1. Zero
2. Maximum

A machine works as a

1. force multiplier,
2. speed multiplier.

In each case, state whether the velocity ratio is more than or less than 1.

In class II lever, effort arm is ______ than the load arm.

In following figure shows three bulbs A, B and C each of rating 100 W, 220 V connected to the mains of 220 V. Answer the following:

1. How is the bulb A connected with the mains? At what voltage does it glow?
2. How are the bulbs B and C connected with the mains? At what voltage does the bulb B glow?
3. How is the glow of bulbs A and C affected if bulb B gets fused?
4. How is the glow of bulbs B and C affected if bulb A gets fused?

What is the nature of the lines of force of the magnetic field due to a straight current carrying wire?

In the diagram XY is a straight conductor carrying current in the direction marked by the arrow. The conductor is held vertical by passing it through a horizontal cardboard sheet.

Draw three magnetic lines of force on the board and mark the direction of magnetic field in your diagram. State two factors on which magnitude of magnetic field at a point, depends.

State two differences between light and sound waves.

Describe a set up for plotting the magnetic lines of force in:  (i) A straight wire, (ii) A circular coil and (iii) A straight solenoid.

When a ray of light travels normal to the given surface, then the angle of refraction is ______.

What should be the angle between the direction of force and the direction of displacement, for work to be negative?

Which electrical component protects the electric circuit in case of excess current and which can also be used as a switch?

Name the wire to which this electrical component is connected in an electric circuit.