Explore topic-wise MCQs in Network Theory.

This section includes 17 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.

A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VBR.

A. 398.37∠210⁰
B. 398.37∠-210⁰
C. 398.37∠120⁰
D. 398.37∠-120⁰
Answer» C. 398.37∠120⁰
Discussion
2.

A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VYB.

A. 398.37∠-30⁰
B. 398.37∠210⁰
C. 398.37∠90⁰
D. 398.37∠-90⁰
Answer» E.
Discussion
3.

A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VRY.

A. 398.37∠30⁰
B. 398.37∠-30⁰
C. 398.37∠90⁰
D. 398.37∠-90⁰
Answer» B. 398.37∠-30⁰
Discussion
4.

The voltages, VBR ,Vph are related in star connected system is?

A. VBR = 3Vph
B. VBR = 3√3Vph
C. VBR = √3Vph
D. VBR = Vph
Answer» D. VBR = Vph
Discussion
5.

In a star connected system, the relation between VYB, Vph is?

A. VYB = Vph
B. VYB = 3√3Vph
C. VYB = 3Vph
D. VYB = √3Vph
Answer» E.
Discussion
6.

The relation between VRY, Vph in a star connected system is?

A. VRY = Vph
B. VRY = √3Vph
C. VRY = 3√3Vph
D. VRY = 3Vph
Answer» C. VRY = 3√3Vph
Discussion
7.

In a star connected system, the phasors VRN, VYN are ____ apart.

A. 15⁰
B. 30⁰
C. 45⁰
D. 60⁰
Answer» E.
Discussion
8.

The relation between the lengths of the phasors VRN and – VYN is?

A. |VRN| > – |VYN|
B. |VRN| < – |VYN|
C. |VRN| = – |VYN|
D. |VRN| >= – |VYN|
Answer» D. |VRN| >= – |VYN|
Discussion
9.

In three phase system, the line voltage VRY is equal to?

A. phasor sum of VRN and VNY
B. phasor difference of VRN and VNY
C. phasor sum of VRN and VNY
D. algebraic sum of VRN and VNY
Answer» B. phasor difference of VRN and VNY
Discussion
10.

In star connected system, VRY is equal to?

A. VYR
B. -VYR
C. 2VYR
D. 3VYR
Answer» C. 2VYR
Discussion
11.

The voltages, VBR ,Vph are related in star connected system is?

A. V<sub>BR</sub> =3V<sub>ph</sub>
B. V<sub>BR</sub> =3‚àö3V<sub>ph</sub>
C. V<sub>BR</sub> =‚àö3V<sub>ph</sub>
D. V<sub>BR</sub> =V<sub>ph</sub>
Answer» D. V<sub>BR</sub> =V<sub>ph</sub>
Discussion
12.

In a star connected system, the relation between VYB ,Vph is?

A. V<sub>YB</sub> =V<sub>ph</sub>
B. V<sub>YB</sub> =3‚àö3V<sub>ph</sub>
C. V<sub>YB</sub> =3V<sub>ph</sub>
D. V<sub>YB</sub> =‚àö3V<sub>ph</sub>
Answer» E.
Discussion
13.

The relation between VRY ,Vph in a star connected system is?

A. V<sub>RY</sub> =V<sub>ph</sub>
B. V<sub>RY</sub> =‚àö3V<sub>ph</sub>
C. V<sub>RY</sub> =3‚àö3V<sub>ph</sub>
D. V<sub>RY</sub> =3V<sub>ph</sub>
Answer» C. V<sub>RY</sub> =3‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ3V<sub>ph</sub>
Discussion
14.

In a star connected system, the phasors VRN , VYN are ____ apart.

A. 15‚Äö√Ö‚àû
B. 30‚Äö√Ö‚àû
C. 45‚Äö√Ö‚àû
D. 60‚Äö√Ö‚àû
Answer» E.
Discussion
15.

The relation between the lengths of the phasors VRN and – VYN is?$

A. |V<sub>RN</sub>| > – |V<sub>YN</sub>|
B. |V<sub>RN</sub>| < – |V<sub>YN</sub>|
C. |V<sub>RN</sub>| = – |V<sub>YN</sub>|
D. |V<sub>RN</sub>| >= – |V<sub>YN</sub>|
Answer» D. |V<sub>RN</sub>| >= ‚Äö√Ñ√∂‚àö√ë‚àö¬® |V<sub>YN</sub>|
Discussion
16.

In three phase system, the line voltage VRY is equal to?

A. phasor sum of V<sub>RN</sub> and V<sub>NY</sub>
B. phasor difference of V<sub>RN</sub> and V<sub>NY</sub>
C. phasor sum of V<sub>RN</sub> and V<sub>NY</sub>
D. algebraic sum of V<sub>RN</sub> and V<sub>NY</sub>
Answer» B. phasor difference of V<sub>RN</sub> and V<sub>NY</sub>
Discussion
17.

In star connected system, VRY is equal to?

A. V<sub>YR</sub>
B. -V<sub>YR</sub>
C. 2V<sub>YR</sub>
D. 3V<sub>YR</sub>
Answer» C. 2V<sub>YR</sub>
Discussion