Wavefront of a wave has direction with wave motion
|
(a) Parallel |
(b) Perpendicular |
(c) Opposite |
(d) At an angle of π |
Wavefront of a wave has direction with wave motion
|
(a) Parallel |
(b) Perpendicular |
(c) Opposite |
(d) At an angle of π |
(b) Perpendicular
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Orbital acceleration of electron is
|
(a) |
(b) |
(c) |
(d) |
Whenever light travels from denser medium to a rarer medium:

Find the power of the circuit
|
(a) 1.5 W |
(b) 2 W |
(c) 1 W |
(d) None of these |
A charged ball B hangs from a silk thread S, which makes an angle θ with a large charged conducting sheet P, as shown in the figure. The surface charge density σ of the sheet is proportional to

|
(a) sin θ |
(b) tan θ |
(c) cos θ |
(c) cos θ |
A convex lens A of focal length 20 cm and a concave lens B of focal length 5 cm are kept along the same axis with the distance d between them. If a parallel beam of light falling on A leaves B as a parallel beam, then distance d in cm will be
|
(a) 25 |
(b) 15 |
(c) 30 |
(d) 50 |
Average energy stored in a pure inductance L when a current i flows through it, is
|
(a) |
(b) |
(c) |
(d) |