- AIf either one or both inputs are 1
- BOnly if both inputs are 1
- CIf either input is zero
- DIf both inputs are zero
Explanation:
At least one input required to activate or − gate

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In a transformer 220 ac voltage is increased to 2200 volts. If the number of turns in the secondary are 2000, then the number of turns in the primary will be
|
(a) 200 |
(b) 100 |
(c) 50 |
(d) 20 |
Ratio between total intensity of magnetic field at equator to poles is
| (a) 1 : 1 | (b) 1 : 2 | (c) 2 : 1 | (d) 1 : 4 |
What should be the angle between two plane mirrors so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other
| (a) 60° | (b) 90° | (c) 120° | (d) 175° |
If the separation between slits in Young’s double slit experiment is reduced to the fringe width becomes n times. The value of n is
|
(a) 3 |
(b) |
(c) 9 |
(d) |