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The number of turns in the primary and the secondary turns of a transformer are 1000 and 3000 respectively. If 80 volts A.C. is supplied to the primary coil of the transformer, then the potential difference/turn of the secondary coil would be
  • a)
    240 V
  • b)
    2400 V
  • c)
    0.24 V
  • d)
    0.08 V
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
The number of turns in the primary and the secondary turns of a transf...
Given,
Number of turns in primary coil, N1 = 1000
Number of turns in secondary coil, N2 = 3000
Voltage supplied to primary coil, V1 = 80V

We know that the voltage ratio of a transformer is equal to the turns ratio of the transformer. That is,

V1 / V2 = N1 / N2

To find the potential difference per turn of the secondary coil, we need to find V2/N2.

V2 / N2 = V1 / N1 * N2

V2 / N2 = 80 / 1000 * 3000

V2 / N2 = 0.08V

Therefore, the potential difference per turn of the secondary coil is 0.08V. Hence, option D is the correct answer.
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A thermal power plant produces electric power of 600 kW at 4000 V, which is to be transported to a place 20 km away from the power plant for consumers usage. It can be transported either directly with a cable of large current carrying capacity or by using a combination of step-up and step-down transformers at the two ends. The drawback of the direct transmission is the large energy dissipation. In the method using transformers, the dissipation is much smaller. In this method , a step-up transformer is used at theplant side so that the current is reduced to a smaller value. At the consumers end, a step-down transformer is used to supply power to the consumers at the specified lower voltage. It is reasonable to assume that the power cable is purely resistive and the transformers are ideal with power factor unity. All the currents and voltages mentioned are rms values.Q.In the method using the transformers, assume that the ratio of the number of turns in the primary to that in the secondary in the step-up transformer is 1 : 10. If the power to the consumers has to be supplied at 200 V, the ratio of the number of turns in the primary to that in the secondary in the stepdown transformer is

ParagraphA thermal power plant produces electric power of 600 kW at 4000 V, which is to be transported to a place 20 km away from the power plant for consumers’ usage. It can be transported either directly with a cable of large current carrying capacity or by using a combination of step-up and step-down transformers at the two ends. The drawback of the direct transmission is the large energy dissipation. In the method using transformers, the dissipation is much smaller. In this method, a step-up transformer is used at the plant side so that the current is reduced to a smaller value. At the consumers’ end, a step-down transformer is used to supply power to the consumers at the specified lower voltage. It is reasonable to assume that the power cable is purely resistive and the transformers are ideal with the power factor unity. All the currents and voltage mentioned are rms values.Q.In the method using the transformers, assume that the ratio of the number of turns in the primary to that inthe secondary in the step-up transformer is 1 : 10. If the power to the consumers has to be supplied at200 V, the ratio of the number of turns in the primary to that in the secondary in the step-down transformeris

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The number of turns in the primary and the secondary turns of a transformer are 1000 and 3000 respectively. If 80 volts A.C. is supplied to the primary coil of the transformer, then the potential difference/turn of the secondary coil would bea)240 Vb)2400 Vc)0.24 Vd)0.08 VCorrect answer is option 'D'. Can you explain this answer?
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