Physics (F.Sc)

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:  

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:  

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:  

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:  

Q: Resistance of a super conductor is

(a) :  finite
(b) :  infinite
(c) :  zero
(d) :  changes with every conductor
(e) :  None
Answer:  zero
Explanation:  

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