Magnetic Field and Force

Question 1

The magnetic field 0.02 m from a wire is 0.1 T. What is the magnitude of the magnetic field 0.01 m from the same wire?

Revolt · Accepted Answer

0.2 T

Question 2

When using the right-hand rule to determine the direction of the magnetic field around a current-carrying straight wire, which part of the right hand points in the direction of the magnetic field?

Revolt · Accepted Answer

fingers

Question 3

The diagram shows a negative charge moving in a magnetic field.

Revolt · Accepted Answer

left

Question 4

A point charge of 5.0 × 10–7 C moves to the right at 2.6 × 105 m/s in a magnetic field that is directed into the screen and has a field strength of 1.8 × 10–2 T.

Revolt · Accepted Answer

2.3 × 10–3 N

Question 5

The diagram shows a positive charge moving in a magnetic field.

Revolt · Accepted Answer

up

Question 6

A current in a wire increases from 2 A to 6 A. How will the magnetic field 0.01 m from the wire change?

Revolt · Accepted Answer

It increases to three times its original value.

Question 7

A wire runs left to right and carries a current in the direction shown.

Revolt · Accepted Answer

into the screen

Question 8

fingerspalmbackthumb

Revolt · Accepted Answer

thumb

Question 9

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field?

Revolt · Accepted Answer

F = |q|vBsin

Question 10

What direction can the charge move and experience no magnetic force? Check all that apply.

Revolt · Accepted Answer

left; right

Magnetic Field and Force Answers

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