Electricity and Magnetism Answers

 Solve for the magnetic flux through a loop with an area of 8.5 ✕ 10 -4 m2 found perpendicular to a magnetic field with magnitude 0.75 T.

An 88.30-cm wire that carries an electric current of 1.35 A perpendicular to the field has experienced a magnetic force of 9.0✕10 -3 N. Solve for the magnitude of the magnetic field that caused this force.

1.   7.55-μC charged particle with a speed of 30.50 m/s is found in a uniform magnetic field with magnitude 1.2 T. Solve for the magnitude of the magnetic force exerted on the charged particle if the particle is moving perpendicular to the field.

If an alpha particle has a velocity of magnitude 500m/s and travels horizontally in space in which there is an upward directed uniform electric field of magnitude 35N/C and a uniform magnetic field where the magnetic field makes an angle of 46⁰ with the particle's velocity vector such that it causes the alpha particle to pass through space undeflected,

How does the presence of the magnetic field causes the alpha particle to pass through undeflected and what happens to the alpha particle in the presence of the electric field?

Explain mutual induction.

A thunderbolt is made of an amount of charge travelling from clouds (at a given potential V1) to ground (at a given potential V2). We can think about it as a wire through which a certain amount of intensity current travels. In order to give an estimation of the amount of charge travelling in the thunderbolt, we measure the intensity of the magnetic field 150m apart from the thunderbolt. The value of B resulted to be 2.5 · 10−4T .

Determine the intensity of electrical current.

An iron bar 23cm with 0.12kg mass is placed perpendicular to a magnetic field B = 8 · 10−2T.

Determine direction and intensity of the current which has to travel through the bar such that the bar is suspended in air.

A conductive wire 23.5cm long is dipped in a magnetic field B, which is per- pendicular to the wire. A current i = 3.5A travels the wire and a force F = 2.2 · 10−4N acts on it.

Compute the value of the magnetic field B.

The circled dots indicate that the magnetic field is exiting from the plane of the paper

An alpha particle, with velocity of magnitude 500 m/s, travels horizontally into a region of space in which

there is an upward-directed uniform electric field of magnitude 36 N/C and a uniform magnetic field. The

magnetic field makes an angle of 41° with the particle’s velocity vector and is such that it causes the alpha

particle to pass through the region of space undeflected.

Explain how the presence of the magnetic field causes the alpha particle to pass through undeflected beginning with an explanation of what happens to the alpha particle in the presence of the electric field.

Also what will be the magnitude of the magnetic field that is required to cause the alpha particle to pass through undeflected.