Q1. Vacuum tubes eventually fail at microwave frequencies because of their
(A) Inter electrode capacitance
(B) Small series inductance
(C) Large shunt capacitance
(D) Increased noise figure

Q2. A ferrite is
(A) A non-conductor with magnetic properties
(B) A conductor with magnetic properties
(C) A semiconductors
(D) An insulator which attenuates magnetic fields

Q3. A field line and an equipotential surface are
(A) inclined at any angle
(B) always at 90°
(C) always parallel
(D) None of these

Q4. Which of the following is a bilateral element?
(A) Capacitance
(B) current source
(C) voltage source
(D) None of these

Q5. Which of the following is the passive element?
(A) Capacitance
(B) current source
(C) voltage source
(D) All of the above

Q6. Out of the following the material having a negative temperature co-efficient of resistance is?
(A) Aluminum
(B) Carbon
(C) Copper
(D) Brass

Q7. Varistors are
(A) insulators
(B) non-linear resistors
(C) conductors
(D) scr

Q8. The property of a conductor due to which it passes current is called?
(A) resistance
(B) conductance
(C) reluctance
(D) permeability

Q9. Which one of the following is the best conductor of electricity?
(A) Copper
(B) Silver
(C) Iron
(D) Carbon

Q10. Which of the following quantities remain the same in all parts of a series circuit?
(A) Power
(B) Current
(C) Voltage
(D) None of these

Q11. transformer transform?
(A) voltage
(B) current
(C) frequency
(D) power

Q12. In a constant k band pass filter, the series elements
(A) Series combination of L and C
(B) Capacitive
(C) Parallel combination of L and C
(D) Inductive

Q13. The magnetic Flux in a transformer follows a path of
(A) Low reluctance
(B) Low conductivity
(C) High conductivity
(D) High reluctance

Q14. the difference between a hole and a electron is that hole
(A) has no inertia
(B) has no mass
(C) has no momentum
(D) always remains in valence band

Q15. For a stable system the roots of the characteristic equation must lie on
(A) Real axis only
(B) Imaginary axis only
(C) Right half plane
(D) Left half plane

Q16. When an instruction is read from the memory it is called
(A) Memory read cycle
(B) Fetch cycle
(C) Instruction cycle
(D) Memory write cycle

Q17. The number of 4:1 MUX required to make 64:1 MUX is
(A) 16
(B) 64
(C) 20
(D) 21

Q18. Echo is heard due to
(A) Refraction
(B) Scattering
(C) Reflection
(D) Interference

Q19. Which type of semiconductor is Donor
(A) N type
(B) P type
(C) Both
(D) None of the above

Q20. Leakage current in the sillicon semiconductor is in the order of
(A) Amps
(B) milli Amps
(C) micro Amps
(D) nano Amps

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