- ANewton.
- BMadam Curie.
- CC. V. Raman.
- DEinstein.
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The refractive index of a prism for a monochromatic wave is and its refracting angle is 60°. For minimum deviation, the angle of incidence will be
|
(a) 30° |
(b) 45° |
(c) 60° |
(d) 75° |
Range of frequencies allotted for commercial FM radio broadcast is
|
(a) 88 to 108 MHz |
(b) 88 to 108 kHz |
(c) 8 to 88 MHz |
(d) 88 to 108 GHz |
A 50 turns circular coil has a radius of 3 cm, it is kept in a magnetic field acting normal to the area of the coil. The magnetic field B increased from 0.10 tesla to 0.35 tesla in 2 milliseconds. The average induced e.m.f. in the coil is
|
(a) 1.77 volts |
(b) 17.7 volts |
(c) 177 volts |
(d) 0.177 volts |
The internal resistances of two cells shown are 0.1 Ω and 0.3 Ω. If R = 0.2 Ω, the potential difference across the cell
|
(a) B will be zero |
(b) A will be zero |
|
(c) A and B will be 2V |
(d) A will be > 2V and B will be < 2V |
A planet which is born sister of earth is
|
(a) Mercury |
(b) Venus |
(c) Mars |
(d) Jupiter |
Shown in the figure here is a convergent lens placed inside a cell filled with a liquid. The lens has focal length + 20 cm when in air and its material has refractive index 1.50. If the liquid has refractive index 1.60, the focal length of the system is
|
(a) + 80 cm |
(b) – 80 cm |
(c) – 24 cm |
(d) –100 cm |