The valence band and conduction band of a solid overlap at low temperature, the solid may be
|
(a) A metal |
(b) A semiconductor |
(c) An insulator |
(d) None of these |
(a) A metal
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Consider the following two statements A and B, and identify the correct choice out of given answers
A. Thermo e.m.f. is minimum at neutral temperature of a thermocouple
B. When two junctions made of two different metallic wires are maintained at different temperatures, an electric current is generated in the circuit.
|
(a) A is false and B is true |
(b) A is true and B is false |
|
(c) Both A and B are false |
(d) Both A and B are true |
The capacity of a parallel plate condenser is C. Its capacity when the separation between the plates is halved will be
|
(a) 4 C |
(b) 2C |
(c) |
(d) |
$\text{y}=\text{a}_1\sin\omega\text{t}$
$\text{y}=\text{a}_2\sin(\omega\text{t}+\in)$
$\text{y}=\text{a}_1\sin2\omega\text{t}$
$\text{y}=\text{a}_2\sin2(\omega\text{t}+\in)$
Interference fringes may be observed due to superposition of:
The measurement of voltmeter in the following circuit is
|
(a) 2.4 V |
(b) 3.4 V |
(c) 4.0 V |
(d) 6.0 V |
A closely wound flat circular coil of 25 turns of wire has diameter of 10 cm and carries a current of 4 ampere. Determine the flux density at the centre of a coil
|
(a) 1.679 |
(b) 2.028 |
|
(c) 1.257 |
(d) 1.512 |
