Explore topic-wise MCQs in Network Theory.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.

1.

Determine the power (kW) drawn by the load.

A. 21
B. 22
C. 23
D. 24
Answer» E.
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 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
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 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
4.

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
5.

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
6.

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
7.

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
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 VBR is?

A. V∠120⁰
B. V∠240⁰
C. V∠-240⁰
D. V∠-120⁰
Answer» D. V∠-120⁰
Discussion
9.

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
10.

IN_THE_QUESTION_7,_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‚Äö√Ñ√∂‚àö‚Ć‚Äö√тĆ303.4‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ªA
Discussion
11.

Determine_the_power_(kW)_drawn_by_the_load.$

A. 21
B. 22
C. 23
D. 24
Answer» E.
Discussion
12.

In the question 7, 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‚Äö√Ñ√∂‚àö‚Ć‚Äö√тĆ-183.4‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ªA
Discussion
13.

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‚Äö√Ñ√∂‚àö‚Ć‚Äö√тĆ63.4‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ªA
Discussion
14.

In the question 4, 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
15.

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)‚Äö√Ñ√∂‚àö‚Ć‚Äö√тĆ‚Äö√†√∂‚àö‚â§
Discussion
16.

In a delta-connected load, the relation between line voltage and the phase voltage is?

A. line voltage > phase voltage
B. line voltage < phase voltage
C. line voltage = phase voltage
D. line voltage >= phase voltage
Answer» D. line voltage >= phase voltage
Discussion
17.

In the question 1, the source voltage VBR is?

A. V∠120⁰
B. V∠240⁰
C. V∠-240⁰
D. V∠-120⁰
Answer» D. V‚Äö√Ñ√∂‚àö‚Ć‚Äö√тĆ-120‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ª
Discussion
18.

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‚Äö√Ñ√∂‚àö‚Ć‚Äö√тĆ120‚Äö√Ñ√∂‚àö√ñ‚Äö√†√ª
Discussion