question_answer

Fig. A and B, show a bulb connected to a cell in two different ways.

(i) What will be the direction of the current through the bulb in both the cases. (Q to P or P to Q)

(ii) Will the bulb glow in both the cases?

(iii) Does the brightness of the glowing bulb depend on the direction of current through it?

Answer:

(i) Current will flow from Q to P in figure A and current will flow from P to Q in figure B. This is because the direction of current is always from +ve terminal to ?ve terminal circuit.

(ii) Yes, the bulb will glow in both the cases. Because the circuit is complete in both cases.

(iii) No, the brightness of the glowing bulb does not depend on the direction of current through it.