In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of

What is the formula of the angle between secondary induced voltage and secondary current? b) phase angle = tan-1 * c) phase angle = tan-1 * d) phase angle = tan-1 *

A

phase angle = tan-1 *

B

(reactance of the secondary winding – reactance of the external burden) / (resistance of the secondary winding + resistance of the external burden)

C

(reactance of the secondary winding – reactance of the external burden) / (resistance of the secondary winding + resistance of the external burden)

D

(reactance of the secondary winding – reactance of the external burden) / (resistance of the secondary winding + resistance of the external burden)

In a Y-connected generator, there is a 120° difference between each line voltage and the nearest phase voltage.

A

True

B

False

Given are the steps to draw a perpendicular to a line from a point outside the line, when the point is near the centre of line. Arrange the steps. Let AB be the line and P be the point outside the line i. The line EP is perpendicular to AB ii. From P take convenient radius and draw arcs which cut AB at two places, say C, D. iii. Join E and P. iv. Now from centers C, D draw arc with radius (more than half of CD), which cut each other at E.

A

i, iv, ii, iii

B

iii, ii, iv, i

C

iv, iii, i, ii

D

ii, iv, iii, i

Given are the steps to draw a perpendicular to a line from a point outside the line, when the point is nearer the centre of line. Arrange the steps. Let AB be the line and P be the point outside the line i. Take P as centre and take some convenient radius draw arcs which cut AB at C, D. ii. Join E, F and extend it, which is perpendicular to AB. iii. From C, D with radius R1 (more than half of CD), draw arcs which cut each other at E. iv. Again from C, D with radius R2 (more than R1), draw arcs which cut each other at F.

A

i, iii, iv, ii

B

iii, ii, iv, i

C

iv, iii, i, ii

D

ii, iv, iii, i

A 3-phase bridge converter is given a three-phase supply in the phase sequence R-Y-B. Let the neutral to R phase voltage be Vm sinωt. The first SCR (connected to R phase) is fired at an angle of 15°. What is the maximum value at the output terminals at this instant?

A

Vm/√2

B

Vm

C

1.5 Vm

D

3 Vm

In a ∆-connected generator, there is a 120° difference between each line current and the nearest phase current.

A

True

B

False

Determine $${I_{\text{N}}}$$ for the circuit consisting of VS, R1, R2 and R3 shown in the given circuit.
Circuit Theorems and Conversions mcq question image

A

676 mA

B

245 mA

C

431 mA

D

75 mA

Find the Norton circuit, that is, I_IN and R_N, for the circuit given below.
Circuit Theorems and Conversions mcq question image

A

478 mA, 12.8 Ω

B

750 mA, 12.8 Ω

C

478 mA, 6.8 Ω

D

750 mA, 6.8 Ω

A three phase 50 Hz transmission line has flat horizontal spacing with 3.5 m between adjacent conductors. The conductors are No. 2/0 hard drawn copper (outside diameter = 1.05cm). The voltage f the line is 110 kV. The line charging current per km of the line is _______________

A

0.17 A/km

B

0.34 A/km

C

0.24 A/km

D

0.48 A/km

A three phase 50 Hz transmission line has flat horizontal spacing with 3.5 m between adjacent conductors. The conductors are No. 2/0 hard drawn copper (outside diameter = 1.05cm). The voltage f the line is 110 kV. The line charging current per conductor of the line is _____________

A

0.085 A/km

B

0.17 A/km

C

0.12 A/km

D

0.24 A/km

In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of

Related Questions