Question 160Electricity & Electronics - 1st Asst/Chief
70% to passA 440/110 V single phase transformer supplies a load of 5 kW at 0.8 power factor load. What will be its secondary current ignoring transformer power losses?
A11.36 A
B14.2 A
C45.45 A
D56.82 A
AI Explanation
The correct answer is D) 56.82 A. To calculate the secondary current of the transformer, we need to use the formula: I = P / (V * cos(θ)), where I is the current, P is the power, V is the voltage, and cos(θ) is the power factor. Given: - Power (P) = 5 kW = 5,000 W - Voltage (V) = 110 V (secondary) - Power factor = 0.8 Plugging these values into the formula, we get: I = 5,000 W / (110 V * 0.8) I = 56.82 A The other options are incorrect because they do not correctly apply the formula to calculate the secondary current of the transformer.
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