For the same secondary voltage, the output voltage from a centre-tap rectifier is ___________ than that of bridge rectifier

The PIV rating of each diode in a bridge rectifier is ___________ that of the equivalent centre-tap rectifier

A

one-half

B

the same as

C

twice

D

four times

L is older than M and taller than N. O is younger than P, older than N and shorter than Q. R is older than S, younger than N, shorter than S and taller than Q. S is older than L, M, O, P, Q, R and S is necessarily false?

A

O is the shortest of the group.

B

N is the second tallest of the group.

C

L is the tallest of the group.

D

Q is the third oldest of the group.

The secondary voltage for a certain power transformer is twice the voltage applied to the primary. The current flowing in the secondary winding will be:

A

One-half the primary current

B

Same as the primary current

C

Twice the primary current

D

No more than 10% less than the primary current

E

None of the above

How many diodes are in a full wave bridge rectifier?

A

8

B

2

C

4

D

3

Ageing of a selenium rectifier may change the output voltage by

A

5 to 10 per cent

B

15 to 20 per cent

C

25 to 30 per cent

D

none of the above

A train 150 meter long and running at a speed of 60 km per hour takes 30 seconds to cross a bridge. what is a length of the bridge?

A

450 meter

B

500 meter

C

350 meter

D

650 meter

A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. The length of the bridge (in meters) is-

A

600

B

750

C

1000

D

1250

The Jamuna bridge is the ---largest bridge in the world.

A

5th

B

9th

C

10th

D

93th

A train 100 m long passes a bridge at the rate of 72 km per hour in 25 seconds. The length of the bridge is-

A

150 m

B

250 m

C

300 m

D

400 m

The Jamuna bridge is the ----largest bridge in the world.

A

5th

B

9th

C

10th

D

93th

For the same secondary voltage, the output voltage from a centre-tap rectifier is ___________ than that of bridge rectifier

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