Question

a) A wire carrying a current I is perpendicular to a magnetic field of strength B. Assuming a fixed length of wire, which of the following changes will result in decreasing the force on the wire by a factor of two? Select all correct answers

- Decreas the current in th e wire to I/2

- Decrease the field strength to B/2

- Decrease the angle from 90 to 45 degrees

- Decrease the angle form 90 to 30 degrees

b) A charged particle travelling parallel to a uniform magnetic field, both pointing up the page, feels a force in which direction?

- to the left

- it feels zero force

- to the right

- it is dependant on the charge ot the particle

c) An electron travelling to the right in a uniform magnetic field pointing into the page feels a force in which direction?

- up the page

- into the page

- down the page

- out of the page

Answer 1

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