- AUnpolarised
- BPlane polarised
- CCircular polarised
- DElliptically polarised
Explanation:
Nicol prism is a polariser in which the O-ray is eliminated by total internal reflection and the light transmitted through it, is E-ray which is completely plane polarised light.
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Two unequal resistors are connected in series across a battery. Then the:
In the following circuit find I1 and I2
|
(a) 0, 0 |
(b) 5 mA, 5 mA |
(c) 5 mA, 0 |
(d) 0, 5 mA |
With a change of load resistance of a triode, used as an amplifier, from 50 kilo ohms to 100 kilo ohms, its voltage amplification changes from 25 to 30. Plate resistance of the triode is
|
(a) 25 kW |
(b) 75 kW |
(c) 7.5 kW |
(d) 2.5 kW |
An electron enters between two horizontal plates separated by 2mm and having a potential difference of 1000V. The force on electron is
|
(a) 8 |
(b) 8 |
(c) 8 |
(d) 8 |
When a resistance of 2 ohm is connected across the terminals of a cell, the current is 0.5 A. When the resistance is increased to 5 ohm, the current is 0.25 A. The e.m.f. of the cell is
|
(a) 1.0 V |
(b) 1.5 V |
(c) 2.0 V |
(d) 2.5 V |
Band spectrum is characteristic of
|
(a) Atoms |
(b) Molecules |
(c) Plasma |
(d) None of the above |