When a plane mirror is rotated through an angle θ then the reflected ray turns through the angle 2θ then the size of the image
| (a) Is doubled | (b) Is halved | (c) Remains the same | (d) Becomes infinite |
When a plane mirror is rotated through an angle θ then the reflected ray turns through the angle 2θ then the size of the image
| (a) Is doubled | (b) Is halved | (c) Remains the same | (d) Becomes infinite |
(c) Remains the same
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For a glass prism, the angle of minimum deviation will be smallest for the light of:
A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be
|
(a) |
(b) |
(c) 2 |
(d) |
If a wire of length 1 meter placed in uniform magnetic field 1.5 Tesla at angle 30° with magnetic field. The current in a wire 10 amp. Then force on a wire will be
|
(a) 7.5 N |
(b) 1.5 N |
(c) 0.5 N |
(d) 2.5 N |
Which of the following is vector quantity
|
(a) Current density |
(b) Current |
(c) Wattless current |
(d) Power |