Magnetism (HSC SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Who discovered that a current-carrying wire creates a magnetic field?
Who discovered that a current-carrying wire creates a magnetic field?
Hans Christian Øersted
What is the main advantage of electromagnets over permanent magnets?
What is the main advantage of electromagnets over permanent magnets?
They can be switched on and off
What is the value of the permeability of free space ?
What is the value of the permeability of free space ?
T m A
How does magnetic field strength vary with distance from a straight current-carrying wire?
How does magnetic field strength vary with distance from a straight current-carrying wire?
Inversely proportional to distance
Using the right-hand rule, if your thumb points along the current, what do your fingers show?
Using the right-hand rule, if your thumb points along the current, what do your fingers show?
Direction of magnetic field lines
What type of field exists inside a tightly wound solenoid?
What type of field exists inside a tightly wound solenoid?
Large, uniform field
In the solenoid formula , what does represent?
In the solenoid formula , what does represent?
Turn density
What happens to the magnetic field strength when the current through a wire is doubled?
What happens to the magnetic field strength when the current through a wire is doubled?
It doubles
What does the density (closeness) of magnetic field lines represent?
What does the density (closeness) of magnetic field lines represent?
Field strength
The magnetic field pattern of a solenoid is most similar to which object?
The magnetic field pattern of a solenoid is most similar to which object?
A bar magnet