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Physics · PYQ NEET UG 2017

हिन्दी

Figure shows a circuit that contains three identical resistors with resistance \( R = 9.0\;\Omega \) each, two identical inductors with inductance \( L = 2.0\text{ mH} \) each, and an ideal battery with emf \( E = 18\text{ V} \). The current 'i' through the battery just after the switch closed is

  1. \( 0.2\text{ A} \)
  2. \( 2\text{ A} \)
  3. \( 0\text{ ampere} \)
  4. \( 2\text{ mA} \)

Correct answer · Option 2

\( 2\text{ A} \)

Explanation

Just after the switch is closed, inductors offer infinite resistance (act as open circuits). The parallel branch with inductors carries no current, leaving only the resistor R in series: \( i = \frac{E}{R} = \frac{18}{9} = 2\text{ A} \).

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