Faraday's Law

According to the diagram, what happens to the magnetic field lines (B lines) in a finite coil?

• They remain within the coil at all times.

• They spread on the outside through a large space.

• They converge into a single point outside the coil.

• They are absorbed by the coil itself.

What is the source of EMF when the slab is moving in a magnetic field?

• A. The potential difference between points a and b

• B. The electric field generated by the charge accumulation

• C. The slab moving in a magnetic field

• D. The magnetic force on positive charges

What does the magnetic flux Φ_B through a surface represent according to Faraday's Law?

• The time rate of change of the electric field

• The integral of the magnetic field over the surface

• The product of current and resistance

• The potential difference across the surface

What is the EMF induced in a circuit determined by, as per Faraday's Law?

• The resistance in the circuit

• The current flowing through the circuit

• The time rate of change of the magnetic flux through that circuit

• The voltage across the battery terminals

What is the significance of the minus sign in the equation for induced EMF according to Faraday's Law?

• It represents the resistance of the circuit

• It indicates the direction of the induced current

• It signifies the potential difference between terminals

• It denotes the strength of the magnetic field

What is the difference between the EMF of a battery and induction EMF?

• The EMF of a battery is due to a chemical reaction, while induction EMF is due to the change in magnetic flux

• The EMF of a battery is always larger than induction EMF

• Induction EMF can only be in part of the loop, while the EMF of a battery is in the entire loop

• The EMF of a battery results in a potential difference, while induction EMF does not

What does the minus sign in Faraday's Law equation represent?

• Ohm's law

• Kirchhoff's voltage law

• Lenz's law

• Joule's law

When the loop is in a region of constant magnetic flux and is not moving, what is the induced current in the loop?

• Clockwise

• Counterclockwise

• No induced current

• Cannot be determined from the given information

What is the expression for the electromotive force (EMF) induced in a loop moving to the right at constant velocity through a uniform magnetic field?

• EMF = Bv

• EMF = Bhv

• EMF = h/v

• EMF = B/h