Home
Class 12
PHYSICS
A power transmission line feeds input po...

A power transmission line feeds input power at 2300 V to a stepdown transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?

A

the rate of transmission is faster at high voltages

B

it is more economical due to less power loss

C

power cannot be transmitted at low voltages

D

a precaution against theft of transmission lines

Text Solution

Verified by Experts

The correct Answer is:
B

it is more economical due to less power loss
Promotional Banner

Topper's Solved these Questions

  • SAMPLE PAPER-16 (UNSOLVED)

    FULL MARKS|Exercise PART-II|9 Videos
  • SAMPLE PAPER-16 (UNSOLVED)

    FULL MARKS|Exercise PART-III|9 Videos
  • SAMPLE PAPER-1 (SOLVED)

    FULL MARKS|Exercise Questions|28 Videos
  • SAMPLE PAPER-2 (SOLVED)

    FULL MARKS|Exercise Part -IV|10 Videos

Similar Questions

Explore conceptually related problems

In a step-down transformer the input voltage is 22 kV and the output voltage is 550 V. The ratio of the number of turns in the secondary to that in the primary is

A step down transformer convert a voltage of 2200 V into 220V in the transmission line. Number of turns in the primary coil is 5000. Efficiency of transformer is 90% and its output power is 8kW. Calculate (i) the number of turns in the secondary coil, (ii) input power.

In step-up transformer the output voltage is 11 kV and the input voltage is 220 V. The ratio of number of turns of secondary to primary is:

A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two wire line carrying power is 0.5 Omega per km. The town gets power from the line through a 4000-220 V step-down transformer at a sub-station in the town. a. Estimate the line power loss in the form of heat. b. How much power must the plant supply assuming there is negligible power less due to leakage? c. Characterise the step up transformer at the plant.

A transformer has 50 turns in the primary and 100 in the secondary. If the primary is connected to a 220 V DC supply, what will be the voltage across the secondary?

The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. I connected to a 220 V as supply. What will be the output voltage?