Minimum deviation is observed with a prism having angle of prism A, angle of deviation δ, angle of incidence i and angle of emergence e. We then have generally
|
(a) i > e |
(b) i < e |
(c) i = e |
(d) i = e = δ |
(c) i = e
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
The current flowing in two coaxial coils in the same direction. On increasing the distance between the two, the electric current will
|
(a) Increase |
(b) Decrease |
|
(c) Remain unchanged |
(d) The information is incomplete |
The electric field between the two spheres of a charged spherical condenser
|
(a) Is zero |
(b) Is constant |
|
(c) Increases with distance from the centre |
(d) Decreases with distance from the centre |
Assertion : A laser beam 0.2 W power can drill holes through a metal sheet, whereas 1000 W torch-light cannot.
Reason : The frequency of laser light is much higher then that of torch light.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this induced electromotive force, induced current and induced charge in the coil is E, I and Q respectively. If the speed of the magnet is doubled, the incorrect statement is
|
(a) E increases |
(b) I increases |
(c) Q remains same |
(d) Q increases |
Angle of minimum deviation for a prism of refractive index 1.5 is equal to the angle of prism. The angle of prism is (cos 41° = 0.75)
|
(a) 62° |
(b) 41° |
(c) 82° |
(d) 31° |