A positively charged particle of charge is accelerated through a potential difference

PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A positively charged particle of charge

q

is accelerated through a potential difference

V

. The particle moves along the

x

-axis and enters a region with electric field

E

directed along the positive

y

-axis. The electric field exists between

x=0

and

x=a

. Beyond

x=a

, there is a magnetic field of strength

B

directed along the positive

y

-axis. Find: (a) At which point does the particle meet the line

x=a

? (b) Find the pitch of the helix formed after the particle enters the region

x\ge a

. The mass of the particle is

m