Current and magnetism (AQA GCSE Physics Combined Science): Quizzes
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12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does an electric current always create around a wire?
What does an electric current always create around a wire?
A magnetic field
What shape do magnetic field lines form around a straight current-carrying wire?
What shape do magnetic field lines form around a straight current-carrying wire?
Concentric circles
In the right-hand rule, which direction does your thumb point?
In the right-hand rule, which direction does your thumb point?
Conventional current direction
Which direction does conventional current flow?
Which direction does conventional current flow?
From positive to negative
What happens to magnetic field strength if current doubles?
What happens to magnetic field strength if current doubles?
It doubles
What happens to field strength if distance from wire doubles?
What happens to field strength if distance from wire doubles?
It halves
What is a solenoid?
What is a solenoid?
A long coil of wire in a spiral
What type of field does a solenoid create inside the coil?
What type of field does a solenoid create inside the coil?
Strong and uniform
Which does NOT strengthen a solenoid's field?
Which does NOT strengthen a solenoid's field?
Decreasing the current
What is created when an iron core is inserted in a solenoid?
What is created when an iron core is inserted in a solenoid?
An electromagnet
What key advantage do solenoids have?
What key advantage do solenoids have?
Magnetism can be turned on/off
If current is at vs at , field strength is:
If current is at vs at , field strength is:
The same