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Magnets and magnetic fields

Magnets and magnetic fields

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Question 2

An air-cored solenoid of length L L\,L and radius r r\,r consists of N N\,N turns of wire of diameter ddd. The solenoid is connected across a power supply of constant DC voltage VVV.

Which of the following modifications will result in the greatest increase in the magnetic flux density B B\,B inside the solenoid?

A

Doubling the number of turns NNN by winding more of the same wire over the same length LLL and radius rrr.

B

Doubling the radius of the solenoid rrr while keeping NNN, LLL, and the wire diameter and material unchanged.

C

Using a wire of the same material but with twice the wire diameter ddd, keeping NNN, LLL, and the solenoid radius rrr constant.

D

Doubling both the length LLL of the solenoid and the number of turns NNN using the same wire.

Markscheme

Magnets and magnetic fields Questions

  1. GCSE
  2. /Physics
  3. /Magnets and magnetic fields

17 exam-style questions on OCR GCSE Physics Magnets and magnetic fields. Each one has a worked solution and a mark scheme showing where the marks go.

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