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

The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.

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.

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.

Name the quality which is measured in eV

Name the quality which is measured in Wh.

Name the quality which is measured in kW.

Draw a labelled diagram showing the three magnetic field lines of a loop carrying current. Mark the direction of current and the direction of magnetic field by arrows in your diagram.

A wire, bent into a circle, carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?