Free Printable Three-phase Uncontrolled Rectifiers (Part 9)

1.

How many diodes in a full-wave rectifier?

a)

2

b)

4

c)

6

d)

8

2.

In general, the output voltage of a full-wave rectifier is equal to $V_{LL}\left(t\right)$ .

a)

True

b)

False

3.

In the three-phase system, the line voltages are leading the phase voltages by ____ .

a)

$+30\degree$

b)

$-30\degree$

c)

$+90\degree$

d)

$-90\degree$

4.

The easy technique to convert the phase voltage waveforms to the line voltage waveforms is shifting the position of the ________.

a)

x-axis.

b)

y-axis.

c)

phase angles.

d)

voltage waveforms.

5.

Choose the correct output voltage equation of a full-wave rectifier during $90\degree\le\omega t\le150\degree$ .

a)

$v_{BY}\left(t\right)$

b)

$v_{RB}\left(t\right)$

c)

$v_{YR}\left(t\right)$

d)

$v_{YB}\left(t\right)$

6.

Choose the correct output current equation of a full-wave rectifier during $150\degree\le\omega t\le210\degree$ .

a)

$i_R\left(t\right)$

b)

$i_Y\left(t\right)$

c)

$i_B\left(t\right)$

d)

No answer.

7.

Which diodes turn-on during $0\le\omega t\le30\degree$ .

a)

D1

b)

D2

c)

D3

d)

D4

e)

D5

8.

The rectifier is connected to a three-phase supply voltage. If the peak amplitude of the supply waveforms is 100 V, calculate the average output voltage of the rectifier.

a)

78 V.

b)

95.5 V.

c)

135 V.

d)

165.4 V.

9.

The rectifier is connected to a three-phase 100 V, 50 Hz programmable supply voltage. Find the RMS output current if the rectifier is supplying a 35 Ω resistive load.

a)

2.74 A.

b)

3.86 A.

c)

4.73 A.

d)

6.69 A.

10.

The rectifier supplies 100 V to the 50 Ω resistive load. What is the average current conducted by each diode?

a)

0.67 A.

b)

1.15 A.

c)

1.41 A.

d)

2 A.

Three-phase Uncontrolled Rectifiers (Part 9)

Total questions: 10

Worksheet time: 3hrs 30mins

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