- ABoth inputs are 0.
- BEither input is 1.
- CBoth inputs are 1.
- DEither input is 0.
Explanation:
The truth table for 2-input OR gate is as shown in the figure. Thus, the output is zero only when both inputs are zero.
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A point source of light is placed in front of a plane mirror:
An electric bulb illuminates a plane surface. The intensity of illumination on the surface at a point 2m away from the bulb is 5
phot (lumen/cm2). The line joining the bulb to the point makes an angle of 60o with the normal to the surface. The intensity of the bulb in candela is
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(a) 40 |
(b) 40 |
(c) 20 |
(d) 40 |
A wave can transmit ...... from one place to another
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(a) Energy |
(b) Amplitude |
(c) Wavelength |
(d) Matter |
A point charge of 40 stat coulomb is placed 2 cm in front of an earthed metallic plane plate of large size. Then the force of attraction on the point charge is
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(a) 100 dynes |
(b) 160 dynes |
(c) 1600 dynes |
(d) 400 dynes |