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Statement I: Maximum power is dissipated in a series LCR circuit with an a.c. source when resonance occurs. Statement II: Maximum power is dissipated in a circuit containing a pure resistor because of the zero phase difference between current and voltage. Choose the correct option.

Asked in JEE Main 10th April 1st Shift 2023 · Average power and heating

• (1) Statement I is true but Statement II is false
• (2) Both Statement I and Statement II are false
• (3) Both Statement I and Statement II are true
• (4) Statement I is false but Statement II is true

Step-by-step solution

Why the other options are wrong

• (1) Rejects II, but a resistor has cos φ=1 and dissipates the most power.
• (2) Rejects both correct statements.
• (4) Rejects I, but at resonance Z=R is minimum and power is maximum.

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