First slide

Transformer

Question

A transformer has an efficiency of 60% and works at 5kW. If the secondary voltage is 150 V, then what is the secondary current?

Easy

A

10 A
B

20 A
C

30 A
D

40 A

Solution

Given: efficiency (η) = 60%; Input power (P_i) = 5 kW = 5000 W; V_S = 150 V. Use efficiency $η = \frac{O u t p u t P o w e r}{I n p u t p o w e r}$ .

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