- ADiffusion
- BDrift
- CBoth drift and diffusion
- DDrift in p region and diffusion in n region
Explanation:
Three important phenomena occurs during formation of pn junction:
Diffusion, Formation of space charge, Drift.
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A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then
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(a) Intensity of the bulb remains the same |
(b) Intensity of the bulb decreases |
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(c) Intensity of the bulb increases |
(d) The bulb ceases to glow |
Half life of
is 5 days. If we start with 50,000 atoms of this isotope, the number of atoms left over after 10 days is
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(a) 5,000 |
(b) 25,000 |
(c) 12,500 |
(d) 20,000 |
Consider an NPN transistor amplifier in common-emitter configuration. The current gain of the transistor is 100. If the collector current changes by 1 mA, what will be the change in emitter current
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(a) 1.1 mA |
(b) 1.01 mA |
(c) 0.01 mA |
(d) 10 mA |
A conducting sphere of radius R = 20 cm is given a charge Q = 16μC. What is at centre
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(a) 3.6 |
(b) 1.8 |
(c) Zero |
(d) 0.9 |