Magnetic Current Effects

What is the direction of the magnetic field around a straight current-carrying wire?

• Straight lines away from the wire

• Random chaotic pattern

• Concentric circles with the wire at the center

• Spiral pattern around the wire

State Fleming's left-hand rule and its significance in relation to magnetic effect current.

• Fleming's left-hand rule is used to calculate the resistance of a conductor in a magnetic field.

• Fleming's left-hand rule is applicable only to stationary conductors in a magnetic field.

• Fleming's left-hand rule is used to determine the speed of electrons in a magnetic field.

• Fleming's left-hand rule is used to determine the direction of the force experienced by a current-carrying conductor in a magnetic field.

Explain the concept of magnetic force on a current-carrying conductor.

• The magnetic force on a current-carrying conductor is the force exerted on the conductor due to the interaction between the magnetic field created by the current and an external magnetic field.

• The magnetic force on a current-carrying conductor is caused by gravitational pull.

• The magnetic force on a current-carrying conductor is unrelated to the current flowing through it.

• The magnetic force on a current-carrying conductor is only present in a vacuum.

How does the magnetic field due to current vary with the distance from the wire?

• Directly proportional to distance

• Constant with distance

• Exponential relationship

• Inverse square law

Define torque on a current loop in a magnetic field.

• Torque is independent of the magnetic field strength

• Torque on a current loop in a magnetic field is the product of the magnetic moment of the loop and the magnetic field strength, given by the formula τ = μ x B, where τ is the torque, μ is the magnetic moment, and B is the magnetic field strength.

• Torque is not affected by the orientation of the current loop

• Torque is inversely proportional to the magnetic moment

In which direction does the magnetic force act on a current-carrying wire placed in a magnetic field?

• Parallel to the current direction in the wire

• Opposite to the magnetic field direction

• Perpendicular to both the current direction in the wire and the magnetic field direction

• In the same direction as the current in the wire

Describe the magnetic field around a straight wire carrying current.

• Concentric circles with the wire at the center

• Rectangular shape around the wire

• Spiral pattern around the wire

• Random scattered lines around the wire

How can the direction of the magnetic field due to current be determined using the right-hand thumb rule?

• Point your left thumb in the direction of the current flow

• The magnetic field lines will be perpendicular to the current flow

• The direction of the magnetic field is determined by the index finger

• Point your right thumb in the direction of the current flow, and your fingers will curl in the direction of the magnetic field lines.

What factors affect the magnitude of the magnetic force on a current-carrying conductor?

• Color of the conductor

• Temperature of the conductor

• Material of the conductor

• Strength of the magnetic field, current flowing through the conductor, length of the conductor within the magnetic field, and angle between current direction and magnetic field lines.

Explain the relationship between the current in a loop and the torque experienced in a magnetic field.

• The torque experienced in a magnetic field on a current-carrying loop is directly proportional to the current flowing through the loop.

• The torque is inversely proportional to the current in the loop.

• The torque is unrelated to the current in the loop.

• The torque is proportional to the resistance in the loop.