A homogeneous electric field E and a uniform magnetic field 
are pointing in the same direction. A proton is projected with its velocity parallel to 
. It will
|
(a) Go on moving in the same direction with increasing velocity |
|
(b) Go on moving in the same direction with constant velocity |
|
(c) Turn to its right |
|
(d) Turn to its left |
(a) Go on moving in the same direction with increasing velocity
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The angle which subtends the periphery of the spherical mirror at the centre of curvature is called:
Two slits, 4 mm apart, are illuminated by light of wavelength 6000 Å. What will be the fringe width on a screen placed 2m from the slits
|
(a) 0.12 mm |
(b) 0.3 mm |
(c) 3.0 mm |
(d) 4.0 mm |
In order to quadruple the resistance of a uniform wire, a part of its length was uniformly stretched till the final length of the entire wire was 1.5 times the original length, the part of the wire was fraction equal to
|
(a) 1 / 8 |
(b) 1 / 6 |
(c) 1 / 10 |
(d) 1 / 4 |