NEET Physics: Current Electricity — MCQ Test 5

Q6. A \( 24 \, \text{V} \) battery with negligible internal resistance is connected to a cubical network of 12 resistors, each \( 4 \, \Omega \). What is the total current?

Q7. A wire of length \( 5 \, \text{m} \) and resistance \( 20 \, \Omega \) is stretched to \( 10 \, \text{m} \). What is the new resistance?

Q8. A Wheatstone bridge with \( R_1 = 9 \, \Omega \), \( R_2 = 18 \, \Omega \), \( R_3 = 12 \, \Omega \), \( R_4 = 24 \, \Omega \) has a \( 20 \, \text{V} \) battery across AC and a galvanometer (\( 5 \, \Omega \)) across BD. What is the current through the galvanometer?

Q9. A \( 15 \, \text{V} \) battery with negligible internal resistance is connected to a \( 3 \, \Omega \) and \( 12 \, \Omega \) resistor in series. What is the power dissipated in the \( 12 \, \Omega \) resistor?

Q10. A \( 12 \, \Omega \) resistor dissipates \( 48 \, \text{W} \) of power. What is the current through it?

NEET Physics — Current Electricity

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A \( 20 \, \text{V} \) battery with negligible internal resistance is connected to a \( 5 \, \Omega \) and \( 15 \, \Omega \) resistor in series. What is the power dissipated in the \( 15 \, \Omega \) resistor?

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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 Negligible, Internal, Resistance, Connected, Resistor, and Dissipated.

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 \( 20 \, \text{V} \) battery with negligible internal resistance is connected to a \( 5 \, \Omega \) and \( 15 \, \Omega \) resistor in series. What is the power dissipated in the \( 15 \, \Omega \) resistor?

  • A.\( 12 \, \text{W} \)
  • B.\( 15 \, \text{W} \)
  • C.\( 18 \, \text{W} \)
  • D.\( 20 \, \text{W} \)
Q2.

A \( 4 \, \Omega \) resistor dissipates \( 16 \, \text{W} \) of power. What is the voltage across it?

  • A.\( 8 \, \text{V} \)
  • B.\( 10 \, \text{V} \)
  • C.\( 12 \, \text{V} \)
  • D.\( 16 \, \text{V} \)
Q3.

A \( 20 \, \text{V} \) battery with \( 2 \, \Omega \) internal resistance delivers a current of \( 2.5 \, \text{A} \) to a resistor. What is the resistance of the resistor?

  • A.\( 5.0 \, \Omega \)
  • B.\( 5.5 \, \Omega \)
  • C.\( 6.0 \, \Omega \)
  • D.\( 6.5 \, \Omega \)
Q4.

A \( 8 \, \text{V} \) battery with \( 1 \, \Omega \) internal resistance is connected to a \( 7 \, \Omega \) resistor. What is the power dissipated in the internal resistance?

  • A.\( 0.5 \, \text{W} \)
  • B.\( 0.8 \, \text{W} \)
  • C.\( 0.9 \, \text{W} \)
  • D.\( 1.0 \, \text{W} \)
Q5.

A copper wire carries \( 3 \, \text{A} \) with a drift speed of \( 9 \times 10^{-5} \, \text{m/s} \). If \( n = 8.5 \times 10^{28} \, \text{m}^{-3} \) and \( e = 1.6 \times 10^{-19} \, \text{C} \), what is the cross-sectional area?

  • A.\( 2.0 \times 10^{-5} \, \text{m}^2 \)
  • B.\( 2.2 \times 10^{-5} \, \text{m}^2 \)
  • C.\( 2.4 \times 10^{-5} \, \text{m}^2 \)
  • D.\( 2.45 \times 10^{-5} \, \text{m}^2 \)

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