On adjusting the P-N junction diode in forward biased
|
(a) Depletion layer increases |
(b) Resistance increases |
|
(c) Both decreases |
(d) None of these |
(c) Both decreases
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion : The air bubble shines in water.
Reason : Air bubble in water shines due to refraction of light
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
A charged particle of mass 0.003 gm is held stationary in space by placing it in a downward direction of electric field of 6 
. Then the magnitude of the charge is
|
(a) 5 |
(b) 5 |
(c) -18 |
(d) -5 |
The half life period of a radioactive substance is 5 min. The amount of substance decayed in 20 min will be
|
(a) 93.75% |
(b) 75% |
(c) 25% |
(d) 6.25% |
A coil having an area 
is placed in a magnetic field which changes from 
to 
in a interval of 2 second. The e.m.f. induced in the coil will be
|
(a) 4 V |
(b) 3 V |
(c) 1.5 V |
(d) 2 V |
Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is
|
(a) No point where electric field is zero |
|
(b) Only one point where potential is zero |
|
(c) Only one point where electric field is zero |
|
(d) a, b |
