basic electronics mcq questions answers part8

Q1. which of the following is a volatile memory
(A) ROM
(B) both RAM & ROM
(C) NITHER RAM & ROM
(D) RAM

Q2. which of the following storage elements can be programmed after packaging?
(A) ROM
(B) Both of these
(C) None of these
(D) EPROM

Q3. zero initial condition means that the system is
(A) working with zero stored energy
(B) working with zero reference siginal
(C) at rest and no energy is stored in any of its component
(D) none of these

Q4. modulation is done in
(A) transmitter
(B) between transmitter and receiver
(C) none of the above
(D) radio receiver

Q5. which of the following is dynamic characteristic
(A) accuracy
(B) dead zone
(C) threshold
(D) lag

Q6. what is modulation?
(A) upsampling process
(B) downsampling process
(C) encoding process
(D) it is a process of changing the characteristic of carrier wave according to modulating signal.

Q7. Field are said to be circularly polarised if their magnitude are
(A) equal and they are in phase
(B) equal but they differ in phase by +-90
(C) unequal and differ in phase by +-90
(D) unequal but are in phase

Q8. The maximum range of a transmitter depends on
(A) its frequency
(B) its power
(C) Both its frequency and power
(D) none of sbove

Q9. random access memory is - storage device
(A) primary
(B) secondary
(C) teritary
(D) hardware

Q10. If the modulation index of an AM was is changed from 0 to 1. The transmitted power
(A) increase by 50 %
(B) increase by 75%
(C) Increase by 100%
(D) Remain unaffected

Q11. what will be the current across switch when it is in off position?
(A) 0
(B) 1
(C) infinity
(D) negative

Q12. The resistance of metallic wire would
(A) increase as the operating frequency increase
(B) decrease as the operating frequency increase
(C) remain unaffected on increasing the operating frequency
(D) first increase then decrease

Q13. Primary winding of a transformer
(A) low voltage
(B) high voltage
(C) can either be a low voltage or high voltage
(D) none of these

Q14. What is the change we can observe in flux if transformer connected to dc supply?
(A) Steady flux produces insted of alternating flux
(B) Flux wiil be disturbed
(C) More leakage flux
(D) High leakage flux

Q15. what is unit of energy?
(A) watt
(B) kg
(C) ampeer
(D) km

Q16. The period of time between an allocation and its subsequent disposal is called
(A) scope
(B) dynamic binding
(C) life time
(D) longevity

Q17. HDLC is
(A) bit oriented
(B) code transported
(C) code depended
(D) none of the above

Q18. which is a 8 bit microprocceser
(A) 8086
(B) 8088
(C) 8085
(D) both b and c

Q19. In practical, waveguide act as
(A) low pass filter
(B) high pass filter
(C) band pass filter
(D) band stop filter

Q20. Automatic gain control is used
(A) to maintain the tuning correct
(B) to reduce the voltage of loud passage of music
(C) to maintain the same amount of output, when stations of different strength are received
(D) to increase the amplification at high frequencies