A parallel plate capacitor is made by stacking n equally spaced plates connected alternately. If the capacitance between any two plates is C then the resultant capacitance is
|
(a) C |
(b) nC |
(c) (n – 1)C |
(d) (n + 1)C |
(c) (n – 1)C
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If the potential difference applied across X-ray tube is V volts, then approximately minimum wavelength of the emitted X-rays will be
|
(a) |
(b) |
(c) |
(d) |
Electrical conductivity of a semiconductor
|
(a) Decreases with the rise in its temperature |
|
(b) Increases with the rise in its temperature |
|
(c) Does not change with the rise in its temperature |
|
(d) First increases and then decreases with the rise in its temperature |
$\text{P}=\lim_\limits{\triangle\text{s}\rightarrow0}\frac{\text{F}}{\triangle\text{s}}$ and $\text{P}_1-\text{P}_2-\text{pgz}$
In an elevator accelerating upward.Thermal neutrons are those which
|
(a) Are at very high temperature |
|
(b) Move with high velocities |
|
(c) Have kinetic energies similar to those of surrounding molecules |
|
(d) Are at rest |
