The relation between Faraday constant (F), chemical equivalent (E) and electrochemical equivalent (Z) is
|
(a) F = EZ |
(b) |
(c) |
(d) |
The relation between Faraday constant (F), chemical equivalent (E) and electrochemical equivalent (Z) is
|
(a) F = EZ |
(b) |
(c) |
(d) |
(c)
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A man cannot see clearly the objects beyond a distance of 20 cm from his eyes. To see distant objects clearly he must use which kind of lenses and of what focal length
|
(a) 100 cm convex |
(b) 100 cm concave |
(c) 20 cm convex |
(d) 20 cm concave |
The i-V characteristic of a P-N junction diode is shown below. The approximate dynamic resistance of the P-N junction when a forward bias of 2volt is applied
|
(a) 1 W |
(b) 0.25 W |
(c) 0.5 W |
(d) 5 W |
Assertion : The refractive index of diamond is and that of liquid is
. If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is 30o.
Reason : μ = where m is the refractive index of diamond with respect to liquid.
|
(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 assertion is false but reason is true. |
An alternating voltage of 141.4V (rms) is applied to a vacuum diode as shown in the figure. The maximum potential difference across the condenser will be
|
(a) 100 V |
(b) 200 V |
(c) 100 |
(d) 200 |
In an hydrogen atom, the electron revolves around the nucleus in an orbit of radius 0.53 . Then the electrical potential produced by the nucleus at the position of the electron is
|
(a) – 13.6 V |
(b) – 27.2 V |
(c) 27.2 V |
(d) 13.6 V |
Curie is a unit of
|
(a) Length |
(b) It is not any unit |
(c) Activity |
(d) Atomic number |