What happens to the strength of the magnetic field when the current in a wire is increased?
Introduction to Electromagnetism and its Applications

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Physics, Science, Engineering
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10th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It fluctuates randomly.
It remains the same.
It increases.
It decreases.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does winding a wire into a solenoid affect the magnetic field?
It makes the magnetic field uniform and stronger.
It has no effect on the magnetic field.
It weakens the magnetic field.
It reverses the direction of the magnetic field.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a common use of simple electromagnets in recycling centers?
To generate electricity.
To cool down machinery.
To separate iron and steel from other materials.
To power electric vehicles.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a circuit breaker, what happens when the current exceeds a certain value?
The circuit starts to oscillate.
The circuit becomes stronger.
The contact moves to the iron core and breaks the circuit.
The circuit remains closed.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What causes the hammer in an electric bell to repeatedly hit the bell?
The continuous flow of current.
The demagnetization of the iron core.
The repeated breaking and remaking of contact.
The constant attraction of the armature.
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