NEET Physics: Current Electricity — MCQ Test 12

Q6. In a circuit with resistors, why does the total power dissipated equal the power supplied by the source in steady state?

Q7. In a circuit with a battery, why does the current establish almost instantaneously when the circuit is closed, despite the slow drift velocity of electrons?

Q8. A \( 7 \, \text{V} \) battery with \( 1 \, \Omega \) internal resistance is connected to a \( 6 \, \Omega \) resistor. What is the power dissipated in the internal resistance?

Q9. What is the primary source of energy dissipation in a resistor carrying current?

Q10. A \( 10 \, \text{V} \) battery with \( 2 \, \Omega \) internal resistance is connected to two resistors \( 4 \, \Omega \) and \( 6 \, \Omega \) in parallel. What is the current through the \( 6 \, \Omega \) resistor?

NEET Physics — Current Electricity

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A \( 15 \, \Omega \) resistor dissipates \( 60 \, \text{W} \) of power. What is the voltage across it?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Current Electricity. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Resistor, Dissipates, Wheatstone, Condition, Galvanometer, and Internal.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A \( 15 \, \Omega \) resistor dissipates \( 60 \, \text{W} \) of power. What is the voltage across it?

  • A. \( 30 \, \text{V} \)
  • B. \( 32 \, \text{V} \)
  • C. \( 35 \, \text{V} \)
  • D. \( 40 \, \text{V} \)

Q2. In a Wheatstone bridge, what is the condition for no current to flow through the galvanometer?

  • A. Resistances are unequal
  • B. Voltage is zero
  • C. Ratio of resistances in opposite arms is equal
  • D. Current is maximum

Q3. A circuit has a \( 8 \, \text{V} \) battery with \( 1 \, \Omega \) internal resistance and two resistors \( 3 \, \Omega \) and \( 6 \, \Omega \) in parallel. What is the total current?

  • A. \( 2.4 \, \text{A} \)
  • B. \( 2.5 \, \text{A} \)
  • C. \( 2.67 \, \text{A} \)
  • D. \( 2.8 \, \text{A} \)

Q4. A \( 24 \, \text{V} \) battery with negligible internal resistance is connected to a \( 4 \, \Omega \) and \( 8 \, \Omega \) resistor in series. What is the power dissipated in the \( 4 \, \Omega \) resistor?

  • A. \( 12 \, \text{W} \)
  • B. \( 16 \, \text{W} \)
  • C. \( 20 \, \text{W} \)
  • D. \( 24 \, \text{W} \)

Q5. What is the significance of the relaxation time in the context of electron drift in a conductor?

  • A. Time to reach maximum speed
  • B. Time for electrons to stop
  • C. Average time between collisions
  • D. Time for current to stabilize

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