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RVUNL’21 EE: Daily Practices Quiz 14-Aug-2021

Each question carries 2 marks.
Negative marking: 0.5 mark
Total Questions: 06
Time: 06 min.

Q1. Which of the following Boolean algebra rules is correct?

Q2. The total charge entering the terminal of an element is given by;
q = (6t² – 12t) mC
The current at t = 3s is
(a) 12 mA
(b) 48 mA
(c) 36 mA
(d) 6 mA
(e) 24 mA

Q3. A load is connected to a circuit. At the terminals to which the load is connected, R_Th = 10 Ω and V_Th = 40 V. The maximum power supplied to the load is
(a) 160 W
(b) 80 W
(c) 40 W
(d) 1 W
(e) 20 W

Q4. When the supply voltage to an induction motor is reduced by 10 %, the maximum torque will be decreased approximately by:
(a) 5 %
(b) 10 %
(c) 19 %
(d) 40 %
(e) 1 %

Q5. It is given that the starting current of a 3-phase induction motor is 3-times the rated current, while the rated slip is 6%. What would be the ratio of starting torque to full-load torque?
(a) 1
(b) 1.8
(c) O.54
(d) 0.6
(e) 0.36

Q6. Choose the characteristics which is NOT related to an ideal op-amp?
(a) Very high gain
(b) Very high input impedance
(c) Very low output impedance
(d) Very low CMRR
(e) None of the above

SOLUTIONS

S6. Ans.(d)
Sol. Ideal op-amp have high input impedance, low output impedance and high gain.

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