Question

(a) Compare the effectiveness of a current limiting circuit breaker with that of a HRC fuse. (6)

(b) A coil having a resistance of 10 Ohm, and an inductance of 0.15 H is connected in series with a capacitor across a 100V, 50Hz supply. If the current and the voltage are in phase what will be the value of the current in the circuit and the voltage drop across the coil? (10)

Answer 1

Part (a)

Comparision of a current limiting circuit breaker with that of a HRC fuse:

Circuit breaker	HRC fuse
Depends on electromagnetism and switching principle.	Works on electrical and thermal properties of conducting material.
Can be used number of times.	Can't be reused
Show indication for its status.	Doesn't show any indication for its status.
They have auxiliary contact.	They don't have any auxiliary contact.
Response time is more than fuses as 0.02 to 0.05 sec.	Response time is very low as 0.002 sec.
Dependent on ambient temperature.	Doesn't depend on the ambient temperatures.

✓ Verified Model Answer (Text Solution)

Comparision of a current limiting circuit breaker with that of a HRC fuse: