A logic gate is an electronic circuit which
|
(a) Makes logic decisions |
|
(b) Allows electrons flow only in one direction |
|
(c) Works binary algebra |
|
(d) Alternates between 0 and 1 values |
(a) Makes logic decisions
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Value of potential at a point due to a point charge is
|
(a) Inversely proportional to square of the distance |
|
(b) Directly proportional to square of the distance |
|
(c) Inversely proportional to the distance |
|
(d) Directly proportional to the distance |
The e.m.f. of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of 2 Ω is connected as a shunt with the cell, the balance point is obtained at 100 cm. The internal resistance of the cell is
|
(a) 0.1 Ω |
(b) 1 Ω |
(c) 2 Ω |
(d) 0.5 Ω |
In a working nuclear reactor, Cadmium rods, (control rods) are used to
|
(a) Speed up neutrons |
(b) Slow down neutrons |
|
(c) Absorb some neutrons |
(d) Absorb all neutrons |
The energy of a charged capacitor resides in
|
(a) The electric field only
|
(b) The magnetic field only |
|
(d) Neither in electric nor magnetic field |
(d) Neither in electric nor magnetic field |
Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is
|
(a) 24 ohm |
(b) 16 ohm |
(c) |
(d) |
n equal resistors are first connected in series and then connected in parallel. What is the ratio of the maximum to the minimum resistance
|
(a) n |
(b) |
(c) |
(d) |
The time of revolution of an electron around a nucleus of charge Ze in nth Bohr orbit is directly proportional to
|
(a) n |
(b) |
(c) |
(d) |
