MCQ
Which causes the formation of rainbow ?
- ADiffraction
- BScattering
- CRefraction
- ✓Dispersion
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Half life of a radioactive element is 10 days. The time during which quantity remains 1/10 of initial mass will be
|
(a) 100 days |
(b) 50 days |
(c) 33 days |
(d) 16 days |
The slope of plate characteristic of a vacuum diode is 2 The plate resistance of diode will be
|
(a) 50 W |
(b) 50 kW |
(c) 500 kW |
(d) 500 kW |
The half life of a radioactive element which has only
of its original mass left after a lapse of 60 days is
|
(a) 12 days |
(b) 32 days |
(c) 60 days |
(d) 64 days |
The reason of current flow in P-N junction in forward bias is
|
(a) Drifting of charge carriers |
(b) Minority charge carriers |
|
(c) Diffusion of charge carriers |
(d) All of these |