Quiz on Motor Effect and Magnetic Forces

What does Fleming's left-hand rule help predict?

• The amount of current in a wire

• The speed of a charged particle

• The direction of the force on a wire

• The strength of a magnetic field

What is the process called when electrons are emitted from a metal's surface due to heating?

• Thermal conduction

• Thermionic emission

• Electromagnetic induction

• Photoelectric effect

What is the formula for the magnetic force on a charge moving in a magnetic field?

• F = qE

• F = qvB sinθ

• F = BIL

• F = mv^2/r

What does the symbol 'B' represent in the context of magnetic fields?

• Current

• Magnetic flux density

• Voltage

• Electric field strength

What happens to the magnetic force on a charge moving along a magnetic field line?

• It doubles

• It decreases

• It increases

• It becomes zero

What is the unit of magnetic field strength?

• Newton

• Coulomb

• Tesla

• Joule

What is the relationship between electric and magnetic fields in electromagnetic phenomena?

• They are intertwined

• They are always parallel

• They are independent

• They never interact

What does the right-hand rule help determine?

• Direction of force on a charge

• Direction of thermal energy

• Direction of magnetic field

• Direction of electric current

What is the effect of increasing the current in a simple DC motor?

• It has no effect

• It reverses the motor's direction

• It makes the motor spin faster

• It slows down the motor

What is the term for the force experienced by two parallel current-carrying wires?

• Frictional force

• Gravitational force

• Magnetic force

• Electrostatic force