Understanding Magnetic Field Strength

What is the SI unit of magnetic field strength?

• Tesla

• Gauss

• Ampere

• Newton

Which of the following symbols is commonly used to represent magnetic field strength in equations?

Which of the following factors does NOT affect the strength of a magnetic field produced by a solenoid?

• Number of turns in the coil

• Current passing through the coil

• Length of the solenoid

• Color of the wire

A magnetic field exerts a force on a moving charge. Which of the following expressions correctly represents the magnitude of this force? (Assume the charge is moving perpendicular to the magnetic field.)

What is the relationship between magnetic field strength and distance from a point source?

• Inversely proportional to the square of the distance

• Directly proportional to the distance

• Inversely proportional to the distance

• Independent of the distance

If the current in a wire is doubled, what happens to the magnetic field strength at a fixed distance from the wire?

• It remains the same

• It doubles

• It halves

• It quadruples

Which of the following devices is used to measure magnetic field strength?

• Voltmeter

• Ammeter

• Gaussmeter

• Thermometer