- A[M L T-3 A-1].
- B[M L T-2 A-1].
- C[M L T-3 A-2].
- DNone.
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To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is
|
(a) Monovalent |
(b) Divalent |
(c) Trivalent |
(d) Pentavalent |
In a transistor circuit shown here the base current is 35 mA. The value of the resistor Rb is

| (a) 123.5 kW | (b) 257 kW | (c) 380.05 kW | (d) None of these |
Television signals broadcast from the moon can be received on the earth while the TV broadcast from Delhi cannot be received at places about 100 km distant from Delhi. This is because
|
(a) There is no atmosphere around the moon |
|
(b) Of strong gravity effect on TV signals |
|
(c) TV signals travel straight and cannot follow the curvature of the earth |
|
(d) There is atmosphere around the earth |
Avalanche breakdown is due to
|
(a) Collision of minority charge carrier |
(b) Increase in depletion layer thickness |
|
(c) Decrease in depletion layer thickness |
(d) None of these |
Gauss’s law should be invalid if
|
(a) There were magnetic monopoles |
|
(b) The inverse square law were not exactly true |
|
(c) The velocity of light were not a universal constant |
|
(d) None of these |