Find the wattmeter reading and the inductance of the coil

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Reference no: EM131269002

a. The inductance of an air-core coil is 0.08 H, and the effective resistance is 4Ω when a 60-V, 50-Hz source is connected across the coil. Find the current passing through the coil and the reading of a wattmeter across the coil.

b. If a brass core is inserted in the coil, the effective resistance increases to 7Ω , and the wattmeter reads 30 W. Find the current passing through the coil and the inductance of the coil.

c. If a solid iron core is inserted in the coil, the effective resistance of the coil increases to 10Ω , and the current decreases to 1.7

Find the wattmeter reading and the inductance of the coil.

Reference no: EM131269002

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