Question

Part A

What is the magnitude of the force per meter of length on a straight wire carrying an 7.90-A current when perpendicular to a 0.70-T uniform magnetic field?

Part B

What if the angle between the wire and field is 57.0 ∘?

Express your answer to two significant figures and include the appropriate units.

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An electron is projected vertically upward with a speed of 1.20×106m/s into a uniform magnetic field of 0.590 T that is directed horizontally away from the observer.

Part A

Describe the electron's path in this field. ( chose )

The electron will move in a counterclockwise circular path if viewed in the direction of the magnetic field.

The electron will move in a clockwise circular path if viewed in the direction of the magnetic field.

The electron will move in a straight line with acceleration.

The electron will move in a straight line without acceleration.

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A helium ion (Q = +2e) whose mass is 6.6×10−27kg is accelerated by a voltage of 3500 V .

Part A

What is its speed?

Part B

What will be its radius of curvature if it moves in a plane perpendicular to a uniform 0.340 T field?

Part C

What is its period of revolution?

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A 3.5-MeV (kinetic energy) proton enters a 0.38-T field, in a plane perpendicular to the field.

Part A

What is the radius of its path?

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If an electric wire is allowed to produce a magnetic field no larger than that of the Earth (0.50×10−4T) at a distance of 28 cm from the wire, what is the maximum current the wire can carry?

Answer 1