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

Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.

Draw a I–V graph for a linear resistor. What does its slope represent? 

Name the factors on which the heat produced in a wire depends when current is passed in it, and state how does it depend on the factors stated by you.

Classify the following amongst contact and non-contact forces.
normal reaction force,

Classify the following amongst contact and non-contact forces.
Frictional force

Classify the following amongst contact and non-contact forces.
gravitation force

Classify the following amongst contact and non-contact forces.
electrostatic force

Classify the following amongst contact and non-contact forces.
magnetic force

What is a fuse? 

A fuse is a short piece of wire of high ______ and of material of low ______.

A fuse wire is made of an alloy of ______ and ______. If the current in a circuit exceeds the current rating of the fuse wire, it ______.

A fuse is connected in ______ with the ______ wire.

Why is the fuse wire fitted in a porcelain casing?

How is a fuse put in an electric circuit?

Describe with the aid of a diagram some form of a fuse which is used in the electric lighting circuit of a house. Give two reasons why a fuse must not be replaced by an ordinary copper wire.

Two fuse wire of same length are rated 5 A and 20 A. Which of the two is thicker?

Explain the meaning of the statement ‘the current rating of a fuse is 5 A’.

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

An electric kettle is rated 3 kW, 250 V. Give reason whether this kettle can be used in a circuit which contains a fuse of current rating 13 A.

Two wires of the same material and same length have radii 1 mm and 2 mm respectively. Compare their resistances.