65.

66.

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68.

69.

70.

71.

12:

A

Which of the following is the most popular DAC?
(^) R - 2R ladder type (03) weighted - resister type
(C) switched - current source type (10) swilched — capacitor type

The sequential circuit in which the output depends only on the present state of flip-flops is

called a ——— cireuit.
) ‏۷٣۳‎ ⋅ (0) ೫1೧೧
(~) तावन्त), (7) None of the above
இவ circuit is used ௩௦ improve the rise time and fall time of pulses.
(५) Multivibrator (18) Oscillator
(C) Monostable (D) Schmitt trigger

How many inputs and outputs does a full adder have?
(ക 2inputs and 2 outputs (B) 2 inputs and 1 output
(C) 3 inputs and 2 outputs ‘ (D)z‘l‘nputsandfiuutpubs

FnranS(‘,.R.dvldtprowctiunisachievedthruughtheuneaf:
f.f\}lll.insarl'P.swiLhSCR (B) RL across SCR
(¢) L in series with SCR (D) None of the above

A single phase voltage controller feeds an induction motor and a heater, which of the
following statements are true?

(ಗಿ) In hoth the loads, fundamental and harmoenics are useful
18 Ininduction motor enly furidamental and in heater only harmonics are useful

(6 11 induction motor only fundamental and in heater fundamental as well கக
harmonies are useful

(D) 1/1 induction motor only harmonics and 10 heater only fundamental are useful
none of the above

A motor armature supplied through phase control SCR's receives a smoother voltage shape
at :

(A) high motor speeds (B) low motor speeds
(0) १८८५ 9९९१ () none of these

A single phase full bridge voltage source inverter (VSI) has inductor as the load. For a
constant source voltage, the current through the inverter is :

(A) Square wave (18) Sine wave
(C) Saw tooth wave (D) Triangular wave

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