- ADoped impurity is low
- BDoped impurity is high
- CLess impurity in N-part
- DLess impurity in P-type
Explanation:
Zener breakdown occurs due to heavily doped diodes.In this process electrons crosses the barrier from the valence band of the p-type to the conduction band of the lightly filled n-type material.
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A coil of wire of resistance 50Ω is embedded in a block of ice. If a potential difference of 210 V is applied across the coil, the amount of ice melted per second will be
|
(a) 4.12 gm |
(b) 4.12 kg |
(c) 3.68 kg |
(d) 2.625 gm |
In the given figure, when key K is opened, the reading of the ammeter A will be
|
(a) 50 A |
(b) 2 A |
(c) 0.5 A |
(d) |
The heat produced by a 100 watt heater in 2 minute will be equal to
|
(a) 12 |
(b) 10 |
(c) 6 |
(d) 3 |
In ballistic galvanometer, the frame on which the coil is wound is non-metallic to
|
(a) Avoid the production of induced e.m.f. |
(b) Avoid the production of eddy currents |
|
(c) Increase the production of eddy currents |
(d) Increase the production of induced e.m.f. |
A spectral line λ = 5000 Å in the light coming from a distant star is observed as a 5200 Å. What will be recession velocity of the star
|
(a) 1.15 |
(b) 1.15 |
(c) 1.15 |
(d) 1.15 km/sec |
An electron is travelling along the x-direction. It encounters a magnetic field in the y-direction. Its subsequent motion will be
|
(a) Straight line along the x-direction |
(b) A circle in the xz-plane |
|
(c) A circle in the yz-plane |
(d) A circle in the xy-plane |