In the figure shown, the effective capacitance between the points A and B, if each has capacitance C, is
|
(a) 2C |
(b) |
(c) 5C |
(d) |
In the figure shown, the effective capacitance between the points A and B, if each has capacitance C, is
|
(a) 2C |
(b) |
(c) 5C |
(d) |
(a) 2C
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A charge moves in a circle perpendicular to a magnetic field. The time period of revolution is independent of
|
(a) Magnetic field |
(b) Charge |
|
(c) Mass of the particle |
(d) Velocity of the particle |
Which statement is correct for a zone plate and a lens
|
(a) Zone plate has multi focii whereas lens has one |
|
(b) Zone plate has one focus whereas lens has multiple focii |
|
(c) Both are correct |
|
(d) Zone plate has one focus whereas a lens has infinite |
Work function of lithium and copper are respectively 2.3 eV and 4.0 eV. Which one of the metal will be useful for the photoelectric cell working with visible light ? (h = 6.6 × 10–34 J-s, c = 3 × 108 m/s)
|
(a) Lithium |
(b) Copper |
(c) Both |
(d) None of these |
A ray of monochromatic light is incident on one refracting face of a prism of angle 75°. It passes through the prism and is incident on the other face at the critical angle. If the refractive index of the material of the prism is , the angle of incidence on the first face of the prism is
|
(a) 30° |
(b) 45° |
(c) 60° |
(d) 0° |