A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is
| (a) Greater than at Q |
| (b) Same as at Q |
| (c) Less than at Q |
| (d) Greater or less than at Q depending upon the strength of the current |
(b) Same as at Q
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How much water should be filled in a container 21 cm in height, so that it appears half filled when viewed from the top of the container (given that a
= 4/3)
|
(a) 8.0 cm |
(b) 10.5 cm |
(c) 12.0 cm |
(d) None of the above |
A proton of energy 200 MeV enters the magnetic field of 5 T. If direction of field is from south to north and motion is upward, the force acting on it will be
|
(a) Zero |
(b) 1.6 |
(c) 3.2 |
(d) 1.6 |
$1$
$2$
$\sqrt{2}$
$\frac{1}{\sqrt{2}}.$
