Q: How much heat does a 40 W bulb generates in one hour?
(a) : 144000J
(b) : 144J
(c) : 1.44J
(d) : 14J
(e) : None
Answer: 144000J
Explanation:
Explanation:
Q: The energy radiated is directly proportional to fourth power of Kelvins temperature is
(a) : Karl-weins law
(b) : Rayleigh Jeans law.
(c) : Stephens law.
(d) : Plancks
(e) : None
Answer: Stephens law.
Explanation:
Explanation:
Q: An object 5kg has a momentum of 20kg x m/s. Its speed will be
(a) : 5m/s
(b) : 4 m/s
(c) : 3 m/s
(d) : 1 m/s
(e) : None
Answer: 4 m/s
Explanation:
Explanation:
Q: Two heating coils A and B connected to 60V direct current. The resistance of A is twice that of B, Current through A will be
(a) : equal that of B
(b) : twice than B
(c) : Half that of B
(d) : one forth that of B
(e) : None
Answer: Half that of B
Explanation:
Explanation:
Q: Resistance of a super conductor is
(a) : finite
(b) : infinite
(c) : zero
(d) : changes with every conductor
(e) : None
Answer: zero
Explanation:
Explanation: