- A[L T A].
- B[L-1 T A].
- C[L-1 T-1 A-1].
- DNone.
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An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of
|
(a) Refraction |
(b) Reflection |
|
(c) Total internal reflectionn |
(d) Dispersion |
A particular emission line, detected in the light from a galaxy, has a wavelength , where
is the proper wavelength of the line. The galaxy distance from us
|
(a) 1.6 |
(b) 0.97 |
(c) 2.4 |
(d) 1.62 |
As a result of interference of two coherent sources of light, energy is
|
(a) Increased |
|
(b) Redistributed and the distribution does not vary with time |
|
(c) Decreased |
|
(d) Redistributed and the distribution changes with time |
A proton, a deuteron and an α - particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If and
denote respectively the radii of the trajectories of these particles, then
|
(a) |
(b) |
(c) |
(d) |

A beam of light propagating in medium A with index of refraction n (A) passes across an interface into medium B with index of refraction n(B). The angle of incidence is greater than the angle of refraction; v(A) and v(B) denotes the speed of light in A and B. Then which of the following is true
|
(a) v(A) > v(B) and n(A) > n(B) |
(b) v(A) > v(B) and n(A) < n(B) |
|
(c) v(A) < v(B) and n(A) > n(B) |
(d) v(A) < v(B) and n(A) < n(B) |
Order of q/m ratio of proton, α -particle and electron is
|
(a) e > p > α |
(b) p > α > e |
(c) e > α > p |
(d) None of these |
The charge on electron was discovered by
|
(a) J.J. Thomson |
(b) Neil Bohr |
(c) Millikan |
(d) Chadwick |
Two spherical conductors A and B of radius a and b (b > a) are placed in air concentrically B is given charge + Q coulomb and A is grounded. The equivalent capacitance of these is
|
(a) 4π |
(b) 4 π |
(c) 4 π |
(d) 4 π |