Physics - P13: electromagnetism recall 0.0 / 5 ? PhysicsElectromagnetismGCSEAQA Created by: LucyCreated on: 03-02-19 20:07 The unit of length is ... metres (m) 1 of 20 The rules of interaction for magnets are ... Like poles repel and unlike poles attract 2 of 20 For a bar magnet, the magnetic field lines ... Curve around from the north pole ot the south pole 3 of 20 Induced magnetism is ... Magnetism created in an unmagnetised magnet material when the material is placed in a magnetic field 4 of 20 Steel is used instead of iron to make permanent magnets because ... Steel doesn't lose its magnetism easily but iron does. 5 of 20 The magnetic field lines around a wire are ... Circles centred on the wire in a plane, perpendicular to the wire 6 of 20 The magnetic field lines in a solenoid are ... Parallel to its axis and are all in the same direction 7 of 20 A uniform magnetic field is ... One in which the magnetic field lines are parallel 8 of 20 Increasing the current in a wire makes ... The magnetic field stronger 9 of 20 Reversing the direction of the current in a wire ... Reverses the magnetic field lines 10 of 20 An electromagnet is ... A solenoid that has an iron core 11 of 20 An electromagnet consists of ... An insulated wire wrapped around an iron bar 12 of 20 In the motor effect, to increase the force ... You can increase the current, the strength of the magnetic field or the length of the wire 13 of 20 In the motor effect, the force is reversed if ... The direction of the current or the magnetic field is reversed 14 of 20 An electric motor has a coil that ruins ... When a current is passed through it. 15 of 20 Magnetic flux density is a measure of ... The strength of a magnetic field 16 of 20 To calculate the force on a current-carrying conductor at right angles to the lines of a magnetic field, use the equation ... F=BxIxI 17 of 20 The unit of magnetic flux density is ... Tesla (T) 18 of 20 The unit of force ... Newton (N) 19 of 20 The unit of current is ... Amperes (A) 20 of 20
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