In figure, Z1 = 200∠60° Ω, Z2 = 400∠ - 90° Ω, Z3 = 300∠0°. Then Z4 for bridge to be balanced is

• 150∠30° Ω
• 400∠ - 90° Ω
• 300∠90° Ω
• 600∠ - 150° Ω

Correct Answer: 600∠ - 150° Ω

Explanation:

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