Explore topic-wise MCQs in Network Theory Questions and Answers.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

A three-phase balanced delta connected load of (4+j8) Ω is connected across a 400V, 3 – Ø balanced supply. Determine the phase current IB.

A. 44.74∠303.4⁰A
B. 44.74∠-303.4⁰A
C. 45.74∠303.4⁰A
D. 45.74∠-303.4⁰A
Answer» C. 45.74∠303.4⁰A
Discussion
2.

A three-phase balanced delta connected load of (4+j8) Ω is connected across a 400V, 3 – Ø balanced supply. Determine the phase current IY.

A. 44.74∠183.4⁰A
B. 45.74∠183.4⁰A
C. 44.74∠183.4⁰A
D. 45.74∠-183.4⁰A
Answer» D. 45.74∠-183.4⁰A
Discussion
3.

A three-phase balanced delta connected load of (4+j8) Ω is connected across a 400V, 3 – Ø balanced supply. Determine the phase current IR. Assume the phase sequence to be RYB.

A. 44.74∠-63.4⁰A
B. 44.74∠63.4⁰A
C. 45.74∠-63.4⁰A
D. 45.74∠63.4⁰A
Answer» B. 44.74∠63.4⁰A
Discussion
4.

If the load impedance is Z∠Ø, the expression obtained for current (IB) is?

A. (V/Z)∠-240+Ø
B. (V/Z)∠-240-Ø
C. (V/Z)∠240-Ø
D. (V/Z)∠240+Ø
Answer» C. (V/Z)∠240-Ø
Discussion
5.

If the load impedance is Z∠Ø, the expression obtained for current (IY) is?

A. (V/Z)∠-120+Ø
B. (V/Z)∠120-Ø
C. (V/Z)∠120+Ø
D. (V/Z)∠-120-Ø
Answer» E.
Discussion
6.

If the load impedance is Z∠Ø, the current (IR) is?

A. (V/Z)∠-Ø
B. (V/Z)∠Ø
C. (V/Z)∠90-Ø
D. (V/Z)∠-90+Ø
Answer» B. (V/Z)∠Ø
Discussion
7.

In a balanced three-phase system-delta load, if we assume the line voltage is VRY = V∠0⁰ as a reference phasor. Then the source voltage VBR is?

A. V∠120⁰
B. V∠240⁰
C. V∠-240⁰
D. V∠-120⁰
Answer» D. V∠-120⁰
Discussion
8.

In a balanced three-phase system-delta load, if we assume the line voltage is VRY = V∠0⁰ as a reference phasor. Then the source voltage VYB is?

A. V∠0⁰
B. V∠-120⁰
C. V∠120⁰
D. V∠240⁰
Answer» C. V∠120⁰
Discussion