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ICSE Class 10 Physics Question 18 of 20

Solved 2018 Question Paper ICSE Class 10 Physics — Question 16

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Question 10(a)

The diagram shows a coil wound around a U shape soft iron bar AB. [3]

The diagram shows a coil wound around a U shape soft iron bar AB. What is the polarity induced at the ends A and B when the switch is pressed? Suggest one way to strengthen the magnetic field in the electromagnet. What will be the polarities at A & B if the direction of current is reversed in the circuit? ICSE 2018 Physics Solved Question Paper.

(i) What is the polarity induced at the ends A and B when the switch is pressed?

(ii) Suggest one way to strengthen the magnetic field in the electromagnet.

(iii) What will be the polarities at A & B if the direction of current is reversed in the circuit?

Answer

(i) The polarity induced at the end A is North and at the end B is South.

(ii) To strengthen the magnetic field in the electromagnet, the current flowing in it is increased.

(iii) On reversing the direction of current, the end A will be south pole and the end B will be the north pole.