Explanation:
The potential is seen to be a constant on a sphere at all points.
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The focal length of a converging lens are fv and fr for violet and red light respectively:
Three equal capacitors, each with capacitance C are connected as shown in figure. Then the equivalent capacitance between A and B is
|
(a) C |
(b) 3C |
(c) |
(d) |
In a Young's experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If it produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be
|
(a) 60 |
(b) 10 |
(c) 10 |
(d) 6 |
In the connections shown in the adjoining figure, the equivalent capacity between A and B will be
|
(a) 10.8 μF |
(b) 69 μF |
(c) 15 μF |
(d) 10 μF |
When a current passes through the junction of two different metals, evolution or absorption of heat at the junction is known as
|
(a) Joule effect |
(b) Seebeck effect |
(c) Peltier effect |
(d) Thomson effect |
An astronaut in a spaceship see the outer space as
|
(a) White |
(b) Black |
(c) Blue |
(d) Red |
