Advertisements
Advertisements
प्रश्न
Given the input current 15 A and the input voltage of 100 V for a step-up transformer having 90% efficiency, find the output power and the voltage in the secondary if the output current is 3 A.
उत्तर
\[\text { Input current } = 15 A\]
\[\text { Input voltage } = 100 V\]
\[efficiency = 90 % = 90/100\]
\[\frac{\text { Output power }}{\text { Input power}} = 0 . 9\]
\[\frac{\text { Output power }}{\text { Input voltage} \text { times Input current }} = \frac{\text { Output power}}{15 \times 100} = 0 . 9\]
\[\text { Output power} = 15 \times 100 \times 0 . 9 = 1350 W\]
\[\text { Outpur current} = 3 A\]
\[\text { Output voltage } = \frac{\text { Output power}}{\text { Output current}} = \frac{1350}{3} = 450 V\]
APPEARS IN
संबंधित प्रश्न
Name the transformer used in the power transmitting station of a power plant.
State two factors on which the magnitude of induced e.m.f. depend.
Explain why an induced current must flow in such a direction so as to oppose the change producing it.
An a.c generator generates an emf 'ε' where ε = 314 Sin (50πt) volt. Calculate the frequency of emf ε.
State the principle of a transformer.
The primary coil of a transformer has 200 turns while the secondary coil has 1000 turns. What type of transformer is this? if the input voltage is 10V, what will be the output voltage?
The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an a.c supply of 120 V and the current flowing in its is 10 A. The voltage and the current in the secondary are ______.
A transformer operating at primary voltage 8 kV and secondary voltage 160 V serves a load of 80 kW. Assuming the transformer to be ideal with purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be:
Magnetic flux Φ in weber in a closed circuit of resistance 10Ω varies with time Φ (sec) as Φ = 6t2 - 5t + 1. The magnitude of induced current at t = 0.25s is ______.
An ideal transformer converts 220 V a.c. to 3.3 kV a.c. to transmit a power of 4.4 kW. If primary coil has 600 turns, then alternating current in secondary coil is ______.
