A proton accelerated by a potential difference 500 KV moves though a transverse magnetic field of 0.51T as shown in figure. The angle θ through which the proton deviates from the initial direction of its motion is
|
(a) 15° |
(b) 30° |
(c) 45° |
(d) 60° |
(b) 30°
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A person's near point is 50 cm and his far point is 3 m. Power of the lenses he requires for
(i) reading and (ii) for seeing distant stars are
|
(a) – 2 D and 0.33 D |
(b) 2 D and – 0.33 D |
(c) – 2 D and 3 D |
(d) 2 D and – 3 D |
The earth's magnetic induction at a certain point is 7 × 
. This is to be annulled by the magnetic induction at the centre of a circular conducting loop of radius 5 cm. The required current in the loop is
|
(a) 0.56 A |
(b) 5.6 A |
(c) 0.28 A |
(d) 2.8 A |
In a plano-convex lens the radius of curvature of the convex lens is 10 cm. If the plane side is polished, then the focal length will be (Refractive index = 1.5)
|
(a) 10.5 cm |
(b) 10 cm |
(c) 5.5 cm |
(d) 5 cm |
The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
|
(a) 7.20 N |
(b) 11.25 N |
(c) 22.50 N |
(d) 45.00 N |
Two identical light sources S1 and S2 emit light of same wavelength l. These light rays will exhibit interference if
|
(a) Their phase differences remain constant |
|
(b) Their phases are distributed randomly |
|
(c) Their light intensities remain constant |
|
(d) Their light intensities change randomly |
A particle with charge q, moving with a momentum p, enters a uniform magnetic field normally. The magnetic field has magnitude B and is confined to a region of width d, where d < 
, The particle is deflected by an angle θ in crossing the field
|
(a) sinθ = |
(b) sinθ = |
(c) sinθ = |
(d) sinθ = |
