The electric field near a conducting surface having a uniform surface charge density σ is given by
|
(a) |
(b) |
|
(c) |
(d) |
The electric field near a conducting surface having a uniform surface charge density σ is given by
|
(a) |
(b) |
|
(c) |
(d) |
(c) and is normal to the surface
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When a resistance of 2ohm is connected across the terminals of a cell, the current is 0.5 amperes. When the resistance is increased to 5 ohm, the current is 0.25 amperes. The internal resistance of the cell is
|
(a) 0.5 ohm |
(b) 1.0 ohm |
(c) 1.5 ohm |
(d) 2.0 ohm |
In the following circuit, 5W resistor develops 45 J/s due to current flowing through it. The power developed per second across 12 W resistor is

|
(a) 16 W |
(b) 192 W |
(c) 36 W |
(d) 64 W |

Light of wavelength 5000 Å falls on a sensitive plate with photoelectric work function of 1.9 eV. The kinetic energy of the photoelectron emitted will be
|
(a) 0.58 eV |
(b) 2.48 eV |
(c) 1.24 eV |
(d) 1.16 eV |
The reading of the ideal voltmeter in the adjoining diagram will be
|
(a) 4 V |
(b) 8 V |
(c) 12 V |
(d) 14 V |
