When cells are connected in parallel, then
|
(a) The current decreases |
(b) The current increases |
|
(c) The e.m.f. increases |
(d) The e.m.f. decreases |
(b) The current increases
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$\mu<\mu',\text{M < M}'$
$\mu>\mu',\text{M < M}'$
$\mu<\mu',\text{M > M}'$
$\mu>\mu',\text{M > M}'$
A hole in a P-type semiconductor is
| (a) An excess electron | (b) A missing electron |
|
(c) A missing atom |
(d) A donor level |
The wavelength of X-rays decreases, when
|
(a) Temperature of target is increased |
|
(b) Intensity of electron beam is increased |
|
(c) K.E. of electrons striking the target is increased |
|
(d) K.E. of electrons striking the target is decreased |
Which one of these is non-divisible
|
(a) Nucleus |
(b) Photon |
(c) Proton |
(d) Atom |
What will be the angular width of central maxima in Fraunhoffer diffraction when light of wavelength 6000 
is used and slit width is 12
|
(a) 2 rad |
(b) 3 rad |
(c) 1 rad |
(d) 8 rad |
A charged particle of mass 5 
is held stationary in space by placing it in an electric field of strength 
directed vertically downwards. The charge on the particle is
|
(a) -20 |
(b) -5 |
(c) 5 |
(d) 20 |
In a PN-junction diode
|
(a) The current in the reverse biased condition is generally very small |
|
(b) The current in the reverse biased condition is small but the forward biased current is independent of the bias voltage |
|
(c) The reverse biased current is strongly dependent on the applied bias voltage |
|
(d) The forward biased current is very small in comparison to reverse biased current |
