NCERT Solutions for Chapter: Electric Current and Its Effects, Exercise 4: LONG ANSWER QUESTIONS

Your teacher has shown you the following activity.

Activity: Teacher has wound a long insulated piece of wire around an iron nail in the form of a coil. Free ends of the wire are connected to a cell through a switch as shown in the figure above. The current is switched on and some pins are placed near the ends of the nail. Write down any three questions that come to your mind about this activity.

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 below. The current flowing in both the circuit is 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 below. The current flowing in both the 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.

How does the magnetic effect of electric current help in the working of an electric bell? Explain with the help of a diagram.

Draw a symbol of the given circuit component: Electric cell.

Draw the symbol of the given circuit component: Switch in off position.

Draw the symbol of the circuit component: An electric bulb.

Draw the symbol of the given circuit component: Battery.