Electromagnetism and Magnetic Forces Quiz

#1. Which of the following are ways that a magnetic field of an electromagnet can be made stronger?

Select all that apply:

Increasing the current flowing through the electromagnet

Reversing the direction of the current

Placing an iron core inside the coil of wires

#2. Why would a wire carrying a current experience a force near a magnetic field?

The current in the wire creates a magnetic field - this interacts with the other magnetic field, making magnetic forces

The copper in the wire is magnetic and naturally experiences magnetic forces in the presence of a magnetic field

#3. Fill in the blank: A current flowing through a wire causes a .......... field.

enter answer here...

#4. The force on a conductor carrying current at right angles to a magnetic field is expressed by which of the following equations?

F = magnetic flux density x resistance x current

F = magnetic flux density x current x length

F = magnetic flux density / current x length

#5. What is the force acting on a conductor carrying current at right angles to a magnetic field when: magnetic flux density = 0.005 T , current = 3 A and length of wire = 150m?

5 N

1.76 N

2.25 N

#6. A wire carrying a current experiences a force near a magnetic field. The size of the force is dependant on which three quantities?

Select all that apply:

The age of the magnetic field

The shape of the magnetic field

The length of the wire

The size of the current

The magnetic field strength

#7. With electromagnetism the direction of the current depends on which of the following?

The strength of the current

The resistance of the wire x the current

The direction of the current

#8. A coil of wire with current flowing through it is an electromagnet. What else do we call a coil of wire?

A theodolite

A solenoid

A caliper

#9. The diagram shows a solenoid. Why is the magnetic field stronger along the centre of the coil than on the outside? ? Select two answers

Select all that apply:

The fields on the inside are stronger due to the nanoelectric effects of electromagnetic induction

The fields cancel out to give a weaker field on the outside

The fields add together in the centre and become nearly uniform and strong

The fields of the outside are weaker due to the greater potential difference at the centre of the wires in the coil

#10. Which device can you use to find the direction of a magnetic field?

A plotting compass

An anemometer

A potometer

#11. A current carrying conductor placed near a magnet experiences a force. The magnet also experiences a force, which is the best description of this force?

Equal and perpendicular

Unequal and opposite

Equal and opposite

Unequal and parallel

Direction of magnetic field and current along a wire

#12. This diagram shows the direction of a magnetic field caused by a current flowing through a conductor. Where is the magnetic field strongest?

Closer to the wire

Further from the wire

At an intermediate distance from the wire

#13. This image shows Flemming's Left Hand Rule. Which of the following answers are the correct interpretations of the rule? ? Select three answers, one for each finger

The index finger shows the direction of the current

The thumb shows the direction of the magnetic field

The middle finger shows the direction of the current

The index finger shows the direction of the magnetic field

The thumb shows the direction of the force

The middle finger shows the direction of the force

#14. If a current travelling along a wire changes direction, does the magnetic field also change direction?

No

Occasionally

Yes

Electromagnetism and Magnetic Forces Quiz

Good Luck!

Results

#1. Which of the following are ways that a magnetic field of an electromagnet can be made stronger?

#2. Why would a wire carrying a current experience a force near a magnetic field?

#3. Fill in the blank: A current flowing through a wire causes a .......... field.

#4. The force on a conductor carrying current at right angles to a magnetic field is expressed by which of the following equations?

#5. What is the force acting on a conductor carrying current at right angles to a magnetic field when: magnetic flux density = 0.005 T , current = 3 A and length of wire = 150m?

#6. A wire carrying a current experiences a force near a magnetic field. The size of the force is dependant on which three quantities?

#7. With electromagnetism the direction of the current depends on which of the following?

#8. A coil of wire with current flowing through it is an electromagnet. What else do we call a coil of wire?

#9. The diagram shows a solenoid. Why is the magnetic field stronger along the centre of the coil than on the outside? ? Select two answers

#10. Which device can you use to find the direction of a magnetic field?

#11. A current carrying conductor placed near a magnet experiences a force. The magnet also experiences a force, which is the best description of this force?

#12. This diagram shows the direction of a magnetic field caused by a current flowing through a conductor. Where is the magnetic field strongest?

#13. This image shows Flemming's Left Hand Rule. Which of the following answers are the correct interpretations of the rule? ? Select three answers, one for each finger

#14. If a current travelling along a wire changes direction, does the magnetic field also change direction?

Quick Links

Subjects

Resources

Contact us today to book your session!

+44 7443 825755

admin@discovertutoring.co.uk