Magnetic Circuit Quiz

What does Ampere's Law state about a closed loop path?

• The electric current is always positive.

• The magnetic field strength is constant.

• The sum of the length elements times the magnetic field equals the permeability times the electric current.

• The sum of the magnetic field is zero.

What is the Right Hand Rule used for?

• Calculating the resistance in a circuit.

• Finding the direction of magnetic field lines.

• Determining the direction of electric current.

• Measuring voltage levels.

What is Flux Density commonly referred to as?

• Magnetic strength.

• Magnetic flux.

• Magnetic field strength.

• B-field.

What does the continuity of flux state?

• Flux lines can only flow in one direction.

• Flux lines entering a closed surface must equal those leaving it.

• Flux lines can be created or destroyed.

• Flux lines are always constant.

What is magnetic reluctance analogous to in an electrical circuit?

• Electrical resistance.

• Inductance.

• Capacitance.

• Voltage.

What phenomenon does Faraday's law describe?

• How a magnetic field interacts with an electric circuit to produce emf.

• The flow of electric charge.

• The relationship between voltage and current.

• The behavior of resistors in a circuit.

What factors affect the magnetic strength of an electromagnet?

• The type of wire used.

• The number of turns of the coil and the current flowing through it.

• The length of the wire.

• The temperature of the environment.

What are core losses in a magnetic circuit primarily caused by?

• Resistance.

• Inductance.

• Eddy currents and hysteresis.

• Capacitance.

What is the formula relating B and H in a magnetic circuit?

• B = I * t.

• B = V / R.

• B = μ * H.

• B = R * I.

What is the primary role of magnetic circuits in power converters?

• To increase voltage levels only.

• To regulate power and improve efficiency.

• To decrease current flow.

• To store energy.