4. Complete the drawing shown in Fig 12.14 to
indicate where the free ends of the two wires
should be joined to make the bulb glow.
5.
What is the purpose of using an electric switch?
Name some electrical gadgets that have switches
built into them.
6. Would the bulb glow after completing the circuit
shown in Fig. 12.14 if instead of safety pin we
use an eraser?
7. Would the bulb glow in the circuit shown in Fig. 12.15?
Fig. 12.14
Fig. 12.15
Answers
Answer:
4. Complete the drawing shown in Fig 12.14 to indicate where the free ends of the two wires should be joined to make the bulb glow.
Answer.
To complete the given circuit, the free terminal of the cell should be connected to one end of the switch and the base terminal of the bulb should be connected to the other end of the switch as shown in the following figure.
5. What is the purpose of using an electric switch? Name some electrical gadgets that have switches built into them.
Answer.
A switch is used to complete or break an electric circuit to use an electric appliance according our convenience.
Some electrical gadgets that have switches built into them are electric lamps, cooler, washing machines, table fan, TV, radio, etc.
6. Would the bulb glow after completing the circuit shown in Fig. 12.14, if instead of safety pin we use an eraser?
Answer.
If we complete the circuit given in Fig. 12.14 using an eraser then the bulb would not glow because eraser is a bad conductor of electricity. Hence, it will break the circuit.
7. Would the bulb glow in the circuit shown in Fig. 12.15?
Answer.
Yes, the bulb would glow in the given circuit because the circuit is closed or complete.
Explanation:
Hope this answer will help you.