# Quiz: Electrical Engineering 05 May 2021

Quiz: Electrical Engineering
Exam: DFCCIL
Topic: AC fundamentals

Each question carries 1 mark.
Negative marking: 1/4 mark
Time: 10 Minute

Q1. A series circuit has R=4 Ω, X_L=12 Ω,X_C=9 Ω and is supplied with 200 V, 50 Hz. Calculate the power.
(a) 8000 W
(b) 19,200 W
(c) 6400 W
(d) 14,400 W

Q2. What is the peak value of the alternating voltage (in V) having an average value of 180 V?
(a) 254.59
(b) 282.57
(c) 333.34
(d) 359.96

Q3. What will be the instantaneous value of the alternating current, which is represented by i(t)=20 sin⁡〖(13t-20)〗, when the value of t is 5?
(a) 10 A
(b) 0 A
(c) 17.32 A
(d) 14.14 A

Q4. A current wave is given by i = 4 + 2√2 sin 3θ + 4√2 sin 5θ. The r.m.s. value of current wave is ………
(a) 10 A
(b) 6 A
(c) √56 A
(d) 5 A

Q5. An alternating voltage is given by v = 100 sin 314 t volts. Its average value will be
………
(a) 70.7 V
(b) 50 V
(c) 63.7 V
(d) 100 V

Q6. The peak factor of a half-wave rectified a.c. is………
(a) 1.57
(b) 2
(c) 1.11
(d) 1.4142

Q7. A 40 Ω resistor is connected across a 15 V variable frequency source. The current
through the resistor when frequency is 100 Hz will be
(a) 0.5 A
(b) 0.1 A
(c) 0.375 A
(d) Cannot be found

Q8. In an a.c. circuit the instantaneous current and voltage are represented as
i= Im sin(ωt –π/6) and v = Vm sin (ωt + π/3).
The voltage leads the current by
(a) π/3
(b) π/2
(c) π/4
(d) π/6

Q9. In an RLC circuit, susceptance is equal to
(a) 1/R
(b) 1/X
(c) X/Z^2
(d) R/Z^2

Q10. The active and reactive power of an inductive circuit are 60 W and 80 VAR respectively. The power factor of the circuit is:
(a) 0.5 lag
(b) 0.6 lag
(c) 0.75 lag
(d) 0.8 lag

SOLUTIONS

×

Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

OR

Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

OR
Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

Enter the email address associated with your account, and we'll email you an OTP to verify it's you.

Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

## Enter OTP

Please enter the OTP sent to
/6

Did not recive OTP?

Resend in 60s

Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

## Almost there

+91

Join India's largest learning destination

What You Will get ?

• Daily Quizes
• Subject-Wise Quizes
• Current Affairs
• Previous year question papers
• Doubt Solving session

## Enter OTP

Please enter the OTP sent to Edit Number

Did not recive OTP?

Resend 60

## By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?

## By skipping this step you will not recieve any free content avalaible on adda247, also you will miss onto notification and job alerts

Are you sure you want to skip this step?