# If the particle in question #4 had a charge of 1.0 C and was moving with a speed of 1.0 m/s, what is the magnitude of magnetic force acting on it…

5.

If the particle in question #4 had a charge of 1.0 C and was moving with a speed of 1.0 m/s, what is the magnitude of magnetic force acting on it caused by a B-field with a magnitude of 0.5 T.

a. 0.90 N

b. 0.53 N

c. 0.59 N

d. 0.17 N

6.

Identify the smallest scale at which one can show magnetic effects?

a. A macroscopic object such as an iron nail

b. A section of a bar magnet

c. A magnetic monopole

d. An atom of an element such as iron

7.

JJ Thomson’s experiment observing the motion of a beam of electrons in crossed E and B fields allowed the measurement of which of the following?

a. The electron charge

b. The charge to mass ratio for an electron

c. The charge of the electron

d. The magnetic field surrounding an electron

8.

A proton is moving (along the +x axis) through crossed E and B fields undeflected. The speed is 2.6×107 m/s. The E-field has a magnitude of 1.9×104 N/C and is directed along the negative y axis. Determine the magnitude of the B-field.

a. 7.3×10-4 T

b. 3.1×10-4 T

c. 9.8×10-4 T

d. 5.2×10-4 T

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