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If the applied voltage of a transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will _____________

If the applied voltage of a transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will _____________ Correct Answer Changes to three times the original value

Magnetic flux density α β/A. Magnetic flux φ α V/f. φ2/ φ1 = V2/V1 * f1/f2. Since voltage is increased by 50%, V2 thus becomes 1.5 times V1 and frequency becomes 0.5 times the original frequency. Thus, maximum flux density changes to 3 times the original value.

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