Multiple choice

Which of the following statements is/are false? a. When a soft iron core is placed in a closed coil carrying current, it acts as an electromagnet. b. The magnitude of magnetic field decreases with the increase in the magnitude of current in the conductor. c. The amount of heat produced in a wire depends on its material, length and thickness.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The magnitude of magnetic field decreases with the increase in the magnitude of current in the conductor, is a false statement. Thus, it is the correct option. The magnitude of magnetic field increases with the increase in the magnitude of current in the conductor.

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