MCQ
In cyclotron the gyro radius is:
- AProportional to momentum.
- BProportional to energy.
- CInversely proportional to momentum.
- DInversely proportional to energy.
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In hydrogen atom, electron makes transition from n=4 to n=1 level. Recoil momentum of the H atom will be
|
(a) 3.4 |
(b) 6.8 |
|
(c) 3.4 |
(d) 6.8 |
64 drops each having the capacity C and potential V are combined to form a big drop. If the charge on the small drop is q, then the charge on the big drop will be
|
(a) 2q |
(b) 4q |
(c) 16q |
(d) 64q |
A concave mirror gives an image three times as large as the object placed at a distance of 20 cm from it. For the image to be real, the focal length should be
|
(a) 10 cm |
(b) 15 cm |
(c) 20 cm |
(d) 30 cm |