- AProduct of A and B is Y
- BY exists when A exists or B exists
- CY exists when both A and B exist but not when only A or B exists
- DY exists when A or B exists but not both A and B exist.
Explanation:
In Boolean algebra A.B = Y implies that Y exists when both A and B exist but not when only A or B exists.
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The amount of charge required to liberate 9 gm of aluminium (atomic weight = 27 and valency = 3) in the process of electrolysis is (Faraday's number = 96500 coulombs/gm equivalent)
|
(a) 321660 coulombs |
(b) 69500 coulombs |
(c) 289500 coulombs |
(d) 96500 coulombs |
A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
|
(a) 9 ohms |
(b) 12 ohms |
(c) 6 ohms |
(d) 8/3 ohms |
The transistors provide good power amplification when they are used in
|
(a) Common collector configuration |
(b) Common emitter configuration |
|
(c) Common base configuration |
(d) None of these |
Specific rotation of sugar solution is 0.01 SI units. 200
of impure sugar solution is taken in a polarimeter tube of length 0.25m and an optical rotation of 0.4rad is observed. The percentage of purity of sugar is the sample is
|
(a) 80% |
(b) 89% |
(c) 11% |
(d) 20% |
A positively charged thin metal ring of radius R is fixed in the xy - plane with its centre at the O. A negatively charged particle P is released from rest at the point (0, 0,
where
. Then the motion of P is
|
(a) Periodic for all values of |
|
(b) Simple harmonic for all values of satisfying 0 < |
|
(c) Approximately simple harmonic provided |
|
(d) a, c |
Given below are symbols for some logic gates

The XOR gate and NOR gate respectively are
|
(a) 1 and 2 |
(b) 2 and 3 |
(c) 3 and 4 |
(d) 1 and 4 |