In helium nucleus, there are
|
(a) 2 protons and 2 electrons |
(b) 2 neutrons, 2 protons and 2 electrons |
|
(c) 2 protons and 2 neutrons |
(d) 2 positrons and 2 protons |
(c) 2 protons and 2 neutrons
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With a potentiometer null point were obtained at 140 cm and 180 cm with cells of emf 1.1 V and one unknown X volts. Unknown emf is
|
(a) 1.1 V |
(b) 1.8 V |
(c) 2.4 V |
(d) 1.41 V |
Three capacitors are connected to D.C. source of 100 volts shown in the adjoining figure. If the charge accumulated on plates of 
and 
are 
and 
respectively, then
|
(a) |
(b) |
|
(c) |
(d) |
The diagram of a logic circuit is given below. The output F of the circuit is represented by
|
(a) W.(X + Y) |
(b) W.(X.Y) |
(c) W + (X.Y) |
(d) W + (X + Y) |
A region surrounding a stationary electric dipoles has
|
(a) Magnetic field only |
(b) Electric field only |
|
(c) Both electric and magnetic fields |
(d) No electric and magnetic fields |
