Home
Class 12
PHYSICS
A transformer with efficiency 80% works ...

A transformer with efficiency 80% works at 4 kW and 100 V. If the secondary voltage is 200V, then the primary and secondary currents are respectively

A

40 A and 16 A

B

16 A and 40 A

C

20 A and 90 A

D

40 A and 20 A

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

A transformer with efficiency 80% works at 4 kW and 100 V . If the secondary voltage is 200 V , then the primary and secondary currents are respectively

A transformer has an efficiency of 80%. It works at 4 kW and 100 V. If secondary voltage is 240 V, the current in primary coil is

A transformer of efficiency 90% has turns ratio 1 : 10. If the voltage across the primary is 220 V and current in the primary is 0.5 A, then the current in secondary is

The mutual inductance between a primary and secondary circuit is 0.5H . The resistance of the primary and the secondary circuits are 20 ohms and 5ohms respectvely. To genrate a current of 0.4A in the secondary,current in the primary must be changed at the rate of

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6A , the voltage across the secondary coil and current in the primary coil respectively are

A transformer has 500 turns in its primary and 1000 turns in its secondary winding. The primary voltage is 200 V and the load in the secondary is 100 2. Calculate the current in the primary, assuming it to be an ideal transformer.

In a transformer , the coefficient of mutual inductance between the primary and the secondary coil is 0.2 henry. When the current changes by 5 ampere//second in the primary, the induced e.m.f. in the secondary will be

In an ideal transformer the number turns of primary and secondary coil is given as 100 and 200 respectively. If the peak value of the primary voltage is 50V, then the r.m.s value of secondary voltage is nearest to

In a transformer the output current and voltage are respectively 4 A and 20V . If the ratio of number of turns in the primary to secondary is 2:1 what is the input current and voltage?

A transformer has 1500 turns in the primary coil and 1125 turns in the secondary coil. If a voltage of 200V is applied across the primary coil , then the voltage in the secondary coil is :