51. During forward bias and reverse bias, an ideal diode has
(A) zero conductance & zero resistance
(B) zero conductance & infinite resistance
(C) infinite conductance & infinite resistance
(D) infinite conductance & zero resistance
52. Pick up the wrong statement from the following :
(A) Fuse is used to protect the system against overload
(B) Ohm’s law is used to calculate the current in an electrolyte
(C) Kirchoff’s current law is derived from Law of conservation of Charge
(D) Kirchoff’s voltage law is derived from the Law of conservation of Energy
53. Hartely oscillator is a :
(A) Phase-shift oscillator
(B) RC oscillator
(C) Crystal oscillator
(D) LC oscillator
54. The commercial Lead acid battery has 15 plates. The number of negative plates will be
(A) 9
(B) 8
(C) 7
(D) 10
55. Which of the following lamp is not a discharge lamp ?
(A) Mercury vapour lamp
(B) Sodium vapour lamp
(C) Neon lamp
(D) Incandescent lamp