(A) Diode
(B) Choke
(C) Transformer
(D) Capacitor
The temperature co efficient of resistance of a semiconductor is?
(A) Positive
(B) Negative
(C) Constant
(D) Infinite
In an amplifier maximum voltage gain is obtained when load resistance is equal to?
(A) Zero
(B) Infinity
(C) Unity
(D) Plate resistance
On making grid potential excessively negative, plate resistance?
(A) Become infinite
(B) Become zero
(C) Remains the same
(D) None of the above
The grid is move closer to the cathode without changing anything, the amplification factor of the valve will?
(A) Decrease
(B) Increase
(C) Remains unchanged
(D) First decrease then increase
A quantity not always conserves in the decay of elementary particles is?
(A) Baryon number
(B) Lepton number
(C) Strangeness number
(D) Electric charge
Unstable elementary particles heavier than the proton are called?
(A) K Mesons
(B) Hyperons
(C) Leptons
(D) Strange particles
Among the following elementary particles , which one is never decays in free space?
(A) Protons
(B) Hyperons
(C) Neutrons
(D) None of the above