- AAre available universally.
- BCan be combined to produce OR, AND and NOT gates.
- CAre widely used in Integrated circuit packages.
- DAre easiest to manufacture.
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A beam of natural light falls on a system of 6 polaroids, which are arranged in succession such that each polaroid is turned through 30° with respect to the preceding one. The percentage of incident intensity that passes through the system will be
|
(a) 100% |
(b) 50% |
(c) 30% |
(d) 12% |
The time period of rotation of the sun is 25 days and its radius is 7 . The Doppler shift for the light of wavelength 6000 Å emitted from the surface of the sun will be
|
(a) 0.04 Å |
(b) 0.40 Å |
(c) 4.00 Å |
(d) 40.0 Å |
Equipotential surfaces are shown in figure. Then the electric field strength will be
|
(a) 100 Vm–1 along X-axis |
(b) 100 Vm–1 along Y-axis |
|
(c) 200 Vm–1 at an angle 120o with X-axis |
(d) 50 Vm–1 at an angle 120o with X-axis |

The two bulbs as in the above question are connected in series to a 200 volt line. Then
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(a) The potential drop across the two bulbs is the same |
|
(b) The potential drop across the 40 watt bulb is greater than the potential drop across the 100 watt bulb |
|
(c) The potential drop across the 100 W bulb is greater than the potential drop across the 40 W bulb |
|
(d) The potential drop across both the bulb is 200 volt |
In the formation of primary rainbow, the sunlight rays emerge at minimum deviation from rain-drop after
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(a) One internal reflection and one refraction |
|
(b) One internal reflection and two refractions |
|
(c) Two internal reflections and one refraction |
|
(d) Two internal reflections and two refractions |