Q31. An electric bulb results in wastage of electricity. Comment

 

Q32. What is the use of electrical fuse?

 

Q33. What are the uses of electromagnets?

 

Q34. When the current is switched on through a wire, a compass needle kept nearby gets deflected from its north-south position. Explain.

 

Q35. Write the key points about electric circuit.

 

Q36. Will the compass needle show deflection when the switch in the circuit shown below is closed?


 

Q37. Draw in your notebook the symbols to represent the following components of electrical circuits: connecting wires, switch in the ‘OFF’ position, bulb, cell, switch in the ‘ON’ position, and battery.

 

Q38. In the circuit shown in the below Fig.


(i) Would any of the bulbs glow when the switch is in the ‘OFF’ position?

(ii) What will be the order in which the bulbs A, B and C will glow when the switch is moved to the ‘ON’ position?

 

Last modified: Sunday, 6 January 2019, 9:36 PM