Year 11 Physics: Magnetism part 2

The right hand grip rule can be used to show:

• The direction of current around a wire

• The direction of the magnetic field around a wire

• How much current is flowing through a wire

• The strength of the magnetic field around a wire

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• No force

• Repelling

• Attraction

• Cannot be determined without testing

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• A

• B

• C

• D

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• A

• B

• C

• D

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Which of the following are factors that can affect the strength of the magnetic field produced by a solenoid?

• The length of the solenoid

• The current of the solenoid

• The radius of the solenoid

• All of the above

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A long straight wire carries a current of 10A from west to easy. What will be the magnetic field strength at a point 20cm above the wire?

• 1.85x11^-6 T

• 2.10x10^-5 T

• 2.66x10^-5 T

• 1.00x10^-5 T

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A 2A current flows through a 5cm long thin solenoid. What is the magnetic field strength in the solenoids interior if it has 500 wire turns?

• 0.030 T

• 0.025 T

• 0.045 T

• 0.050 T

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The right hand slap rule associates three parts of the hand to represent force, magnetic field and current. Name what parts of the hand represents each of the above and which way they face/point.

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Select which of the following answers will result in a larger force

• If the strength of a magnetic field is increased

• If the magnetic field acts on a larger current in the wire

• If the magnetic field acts on a longer wire

• If there are more wires in the magnetic field

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What is the difference between soft iron and hard iron, with reference to its magnetism.

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