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The equivalent resistance of resistors connected in series is always
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(a) Equal to the mean of component resistors |
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(b) Less than the lowest of component resistors |
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(c) In between the lowest and the highest of component resistors |
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(d) Equal to sum of component resistors |
Magnifying glass forms:
Light of frequency 8 
is incident on a substance of photoelectric work function 6.125eV. The maximum kinetic energy of the emitted photoelectrons is
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(a) 17eV |
(b) 22eV |
(c) 27eV |
(d) 37eV |
Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor
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(a)
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(b)
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(c)
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(d)
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In NPN transistor the collector current is 10 mA. If 90% of electrons emitted reach the collector, then
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(a) Emitter current will be 9 mA |
(b) Emitter current will be 11.1 mA |
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(c) Base current will be 0.1 mA |
(d) Base current will be 0.01 mA |
The time required to pass the light through a glass slab of 2 mm thick is (
)
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(a) |
(b) |
(c) |
(d) |
