The ionization potential for second He electron is
|
(a) 13.6 eV |
(b) 27.2 eV |
(c) 54.4 eV |
(d) 100 eV |
The ionization potential for second He electron is
|
(a) 13.6 eV |
(b) 27.2 eV |
(c) 54.4 eV |
(d) 100 eV |
(c) 54.4 eV
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Consider an NPN transistor amplifier in common-emitter configuration. The current gain of the transistor is 100. If the collector current changes by 1 mA, what will be the change in emitter current
|
(a) 1.1 mA |
(b) 1.01 mA |
(c) 0.01 mA |
(d) 10 mA |

Assertion : No interference pattern is detected when two coherent sources are infinitely close to each other.
Reason : The fringe width is inversely proportional to the distance between the two slits.
|
(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 coil of area 80 square cm and 50 turns is rotating with 2000 revolutions per minute about an axis perpendicular to a magnetic field of 0.05 Tesla. The maximum value of the e.m.f. developed in it is
|
(a) 200π volt |
(b) |
(c) |
(d) |
Thermocouple is a device for the measurement of
|
(a) Absolute temperature of a metal |
|
(b) The temperature difference between two substances |
|
(c) The couple acting on a wire |
|
(d) Thermal conductivity of a substance |