# Quiz: Electrical Engineering 26 Apr 2021

Quiz: Electrical Engineering
Exam: AE/JE
Topic: Miscellaneous

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

Q1. The current gain of a common emitter configuration of a transistor circuit is
(a) I_C/I_E
(b) I_E/C
(c) I_C/I_B
(d) I_B/I_C

Q2. A chopper circuit fed from an input voltage of 20 V DC, delivers a load power of 16 W. for a chopper efficiency of 0.8, the input current is
(a) 0.8 A
(b) 0.64 A
(c) 1 A
(d) 1.25 A

Q3. The Fourier series of a real periodic function has only
(P) cosine terms if it is even
(Q) sine terms if it is even
(R) cosine terms if it is odd
(S) sine terms if it is odd
Which of the above statements are correct?
(a) P and S
(b) P and R
(c) Q and S
(d) Q and R

Q4. If, in a DC machine, the ratio of constant losses to armature resistance is 3, then at maximum efficiency, the magnitude of current flowing will be:
(a) 3 A
(b) 1.732 A
(c) 9 A
(d) 6.667 A

Q5. A 6-pole DC machine having wave winding has………………number of parallel paths.
(a) 1
(b) 2
(c) 3
(d) 6

Q6. A GTO can be turned on by applying
(a) Positive gate signal
(b) Positive drain signal
(c) Positive source signal
(d) None of the above

Q7. A single-phase half wave rectifier is feeding a resistive load. When α = 0, dc output voltage is 127 V. When α = 30°, the dc output voltage will be about
(a) 127
(b) 119
(c) 110
(d) 100

Q8. Schering bridge is used to measure
(a) Dielectric loss
(b) The inductance
(c) Low resistance
(d) Mutual Inductance

Q9. An ac source is applied to pure inductive circuit. What is active power consumed by the circuit?
(a) Zero
(b) V^2/X_L
(c) VI
(d) 1/2 LI^2

Q10. An ammeter is obtained by shunting a 30 Ω resistance. What additional shunt should be connected across it to double the range?
(a) 5 Ω
(b) 10 Ω
(c) 15 Ω
(d) 30 Ω

SOLUTIONS

S8. Ans.(a)
Sol. Schering bridge is used to measure dielectric loss. It is an AC bridge circuit that is used for measuring the insulating properties of electrical cables and equipment. It has the advantage that the balance equation is independent of frequency.
Maxwell bridge is used to measure the value of unknown inductance.
Heaviside bridge is used to measured mutual inductance in terms of a known self-inductance.
Kelvin bridge is used to measure the value of low resistance.

S9. Ans.(a)
Sol. P=VI cos⁡〖ϕ=VI cos⁡〖90^0=0〗 〗(for pure inductor, ϕ=90
NOTE: pure inductor and capacitor consumes only reactive power.

S10. Ans.(d)
Sol. m=2=I/Im
∴Rsh=Rm/(m-1)=30/(2-1)=30 Ω

×

Join India's largest learning destination

What You Will get ?

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

OR

Join India's largest learning destination

What You Will get ?

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

OR
Join India's largest learning destination

What You Will get ?

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

Join India's largest learning destination

What You Will get ?

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

Almost there

+91

Join India's largest learning destination

What You Will get ?

• Daily Quizzes
• Subject-Wise Quizzes
• 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?