Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand
| (a) None | (b) 1 | (c) 2 | (d) 3 |
Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand
| (a) None | (b) 1 | (c) 2 | (d) 3 |
(b) 1
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A plano-convex lens is made of refractive index of 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is
|
(a) 400 cm |
(b) 200 cm |
(c) 100 cm |
(d) 50 cm |
A parallel plate air capacitor has a capacitance of 100 μμF. The plates are at a distance d apart. If a slab of thickness t( t ≤ d) and dielectric constant 5 is introduced between the parallel plates, then the capacitance will be
|
(a) 50 μμF |
(b) 100 μμF |
(c) 200 μμF |
(d) 500 μμF |
A particle of mass M at rest decays into two particles of masses m1 and m2, having non-zero velocities. The ratio of the de-Broglie wavelengths of the particles,
is
|
(a) |
(b) |
(c) 1.0 |
(d) |
An electromagnetic wave, going through vacuum is described by. Which of the following is independent of wavelength
| (a) k | (b) w | (c) k/w | (d) kw |
Which of the following statement(s) is/(are) correct
|
(a) The rest mass of a stable nucleus is less than the sum of the rest masses of its separated nucleons |
|
(b) In nuclear fission, energy is released by fragmentation of a very heavy nucleus |
|
(c) The rest mass of a stable nucleus is greater than the sum of the rest masses of its separated nucleons. |
|
(d) a, b |
In Young's experiment, light of wavelength 4000 Å is used to produce bright fringes of width 0.6 mm, at a distance of 2 meters. If the whole apparatus is dipped in a liquid of refractive index 1.5, then fringe width will be
|
(a) 0.2 mm |
(b) 0.3 mm |
(c) 0.4 mm |
(d) 1.2 mm |