Ampere's Law

Ampere's Law helps us

• calculate the magnetic field produced by a straight conductor when a current is run through it

• calculate the current produced by a straight conductor when a magnetic field is present

• calculate the magnetic field produced by any shape conductor when a current is run through it

• calculate the amount of resistance in a wire when current is passed through it

When Ampere ran current through 2 parallel wires in the same direction,

• the wires attracted

• the wires repelled

• the wires flew away

• the wires exploded

When Ampere ran current through 2 parallel wires in the opposite direction,

• the wires attracted

• the wires repelled

• the wires flew away

• the wires exploded

Ampere's law states that B = μ₀I / 2πr. This is useful in practice because

• people want to see wires move

• it allows people to calculate a magnetic field as long as they know how much current there is and the radius of a conductor

• it allows people to calculate a magnetic field as long as they know how much current there is and the length of a wire

• it allows people to calculate the amount of current passing through as long as they know the magnetic field strength and the radius of a conductor

Ampere's law states that B = μ₀I / 2πr. The name of the constant, μ_0, is

• Ampere's number

• Ampere's constant

• the permeability of closed space

• the permeability of free space

What is the magnitude of a magnetic field from a 3.5 cm straight conductor with a current of 1.8 A?

• 1.0 * 10^-5 T

• 1.5 * 10^-5 T

• 2.1 * 10^-5 T

• 2.2 * 10^-4 T

What is the magnitude of a magnetic field in the core of a 6.2 cm solenoid with a current of 11.2 A and 480 turns?

• 0.01 T

• 0.11 T

• 0.45 T

• 0.85 T

Ampere’s circuital law is analogous to a law in electrostatics.That law is

• Gauss’s law

• Kirchhoff’s law

• Faraday’s law

• Coulomb’s law

Amperes circuital law holds for

• unsteady current

• steady current

• any type of current

• variable current

The direction of magnetic field is determined by

• Fleming left hand rule

• Right hand thumb rule

• Fleming right hand rule

• None of these