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

'A fuse is rated 8 A'. Can it be used with an electrical appliance of rating 5 kW, 200 V?

Name two safety devices which are connected to the live wire of a household electric circuit.

Why is it not advisable to use a piece of copper wire as fuse wire in an electric circuit?

Give one example of static equilibrium.

Give one example of dynamic equilibrium.

Which class of lever will always have MA > 1 and why?

Rajan exerts a force of 150 N in pulling a cart at a constant speed of 10 m/s^-1. Calculate the power exerted.

Why does a current carrying, freely suspended solenoid rest along a particular direction?

State the direction in which current-carrying freely suspended solenoid rests

The relationship between the potential difference and the current in a conductor is stated in the form of a law.

1) Name the law.

2) What does the slope of V-I graph for a conductor represent?

3) Name the material used for making the connecting wire.

Name the radiation which can be detected by a thermopile.

What is an Ohmic resistor?

The diagram below shows a lever in use:

1. To which class of levers does it belong?
2. Without changing the dimensions of the lever, if the load is shifted towards the fulcrum what happens to the mechanical advantage of the lever?

Name a machine to obtain gain in speed?

Name the physical quantity which is measured in calorie. How is it related to the S.I. unit of the quality?

A ray of light from air suffers partial reflection and refraction at the boundary of water. In Fig. 4.16, which of the ray A, B, C, D and E is the correct
(i) refracted ray
(ii) partially reflected ray? 

Differentiate between watt and watt hour.

What is a lever?

State the principle of a lever?

Write down a relation expressing the mechanical advantage of a lever.