A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be
|
(a) 1840 keV |
(b) 1/1840 keV |
(c) 1 keV |
(d) 920 keV |
(c) 1 keV
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$\text{n}_\text{p}\neq\text{n}_\text{e}$
The resistance of a wire of uniform diameter d and length L is R. The resistance of another wire of the same material but diameter 2d and length 4L will be
|
(a) 2R |
(b) R |
(c) R/2 |
(d) R/4 |
The momentum of a photon in an X-ray beam of 
metre wavelength is
|
(a) 1.5 |
(b) 6.6 |
|
(c) 6.6 |
(d) 2.5 |
$\lambda'>\lambda$
$\lambda'=\lambda$
$\lambda'<\lambda$
The frequency of the incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is
|
(a) Double the earlier value |
(b) Unchanged |
|
(c) More than doubled |
(d) Less than doubled |
