In X-ray experiment Ka, Kb denotes
|
(a) Characteristic |
(b) Continuous wavelength |
|
(c) a, b-emissions respectively |
(d) None of these |
In X-ray experiment Ka, Kb denotes
|
(a) Characteristic |
(b) Continuous wavelength |
|
(c) a, b-emissions respectively |
(d) None of these |
(a) Characteristic
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Material A has critical angle
and material B has critical angle
. Then which of the following is true
(i) Light can be totally internally reflected when it passes from B to A
(ii) Light can be totally internally reflected when it passes from A to B
(iii) Critical angle for total internal reflection is
(iv) Critical angle between A and B is ![]()
|
(a) (i) and (iii) |
(b) (i) and (iv) |
(c) (ii) and (iii) |
(d) (ii) and (iv) |
Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is
|
(a) F/4 |
(b) 3F/4 |
(c) F/8 |
(d) 3F/ 8 |
The points resembling equal potentials are

|
(a) P and Q |
(b) S and Q |
(c) S and R |
(d) P and R |
In an inductor of inductance L = 100 mH, a current of I = 10A is flowing. The energy stored in the inductor is
|
(a) 5 J |
(b) 10 J |
(c) 100 J |
(d) 1000 J |
The momentum of a photon is 2
gm-cm/sec. Its energy is
|
(a) 0.61 |
(b) 2.0 |
(c) 6 |
(d) 6 |
A 2 MeV proton is moving perpendicular to a uniform magnetic field of 2.5 tesla. The force on the proton is
|
(a) 2.5 |
(b) 7.6 |
(c) 2.5 |
(d) 7.6 |
Focal length of a plane mirror is
|
(a) Zero |
(b) Infinite |
(c) Very less |
(d) Indefinite |