Subject Experts Solutions for Chapter: Electric Current and Its Effects, Exercise 2: Exercise 14.2

Name any four electrical appliances in which the heating effect of electric current is utilised.

Why does the bulb in the circuit given below in figure does not glow? Draw the circuit with required change.

What is a solenoid? Draw a diagram with a solenoid connected in a circuit. How can you increase the strength of a solenoid?

What is an electromagnet? Give four uses of an electromagnet.

Draw a well labelled diagram of an electric bell and explain its working.

With the help of an activity, show the magnetic effect of current.

Paheli took a wire of length $10 \mathrm{cm}$. Boojho took a wire of $5 \mathrm{cm}$ of the same material and thickness. Both of them connected the wires as shown in the circuit given in figure. The current flowing in both the circuits is the same. Will the heat produced in both the cases be equal? Explain.

Paheli took a wire of length $10 \mathrm{cm}$. Boojho took a wire of $5 \mathrm{cm}$ of the same material and thickness. Both of them connected the wires as shown in the circuit given in the figure. The current flowing in both circuits is the same. Will, the heat produced be the same if the wires taken by them are of equal lengths but of different thickness? Explain.