Question

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Figure B shows four situations in which a charged particle moves through a uniform electric field and a uniform magnetic field. Each situation also shows the velocity of the particle at an instant- in which will the particle next move up the page as it continues? a) I only b) 2 only c) only d) 4 only e) I and 2 f) 3 and 4 g) 1 and 4 h) 2 and 3 i) none j) all four

Answer 1

Fe = E*q = 200*1.6*106-19 = 320*10^-19 N

Fb = v*B*q = 1200*0.2*1.6*10^-19 = 384*10^-19 N

1) Fe = 320*10^-19 N y

Fb = 384*10^-19 N -y

Fnet = -64*10^-19 N.....down wards

2)

1) Fe = 320*10^-19 N -x

Fb = 384*10^-19 N +x

Fnet = 64*10^-19 N.....right side

3)

1) Fe = 320*10^-19 N +y

Fb = 384*10^-19 N -y

Fnet = 64*10^-19 N.....upwards

answer is d)) 4 only

Answer 2

d) 4 only