Electromagnetic Induction Test

Result

Electromagnetic Induction Test - 19

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

A primary winding of transformer has 500 turns whereas its secondary has 5000 turns. Primary is connected to ac supply of 20V, 50Hz The secondary output of....

A
200V, 25 Hz

B
200 V, 50Hz

C
2 V, 100 Hz

D
2V, 50 Hz
Question 2
4 / -1

A step down transformer is connected to main supply 200 V to operate a 6V, 30 w bulb. The current in primary is.....

A
3A

B
1.5 A

C
0.3 A

D
0.15 A
Question 3
4 / -1

Alternating current can not be measured by dc ammeter because,

A
ac can not pass through dc ammeter

B
Average value of complete cycle is zero

C
ac is virtual

D
ac changes its direction
Question 4
4 / -1

The resistance of a coil for dc is in ohms. In ac, the resistance

A
will remain same

B
will increase

C
will decrease

D
will be zero
Question 5
4 / -1

An alternating current of rms value 10 A is passed through a 12Ω resistance. The maximum potential difference across the resistor is,

A
20 V

B
90 V

C
169. 68 V

D
None of these
Question 6
4 / -1

220 V, 50 Hz, ac is applied to a resistor. The instantaneous value of voltage is

A

B
220sin100πt

C

D
220sin50πt
Question 7
4 / -1

General in an alternating current circuit.

A
The average value of current is 20w

B
The average value of square of current is zero

C
Average power dissipation is zero

D
The phase difference between voltage and current is zero
Question 8
4 / -1

In the transmission of a.c. power through transmission lines, when the voltage is shaped up n times, the power loss in transmission,

A
increase n times

B
Decrease n times

C
Increase n² times

D
Decrease n² times
Question 9
4 / -1

An alternating voltage is represented as E = 20 sin300t. The average value of voltage over one cycle will be.

A
zero

B
10 volt

C

D
Question 10
4 / -1

An ac source is rated at 220V, 50 Hz. The time taken for voltage to change from its peak value to zero is,

A
50 sec

B
0.02 sec

C
5 sec

D
5 × 10^–3 sec