Figure 28-30 shows the path of an electron that passes through two regions conta

Question

Figure 28-30 shows the path of an electron that passes through two regions containing uniform magnetic fields of magnitudes B1 and B2. Its path in each region is a half-circle Which statements are true? (Select all that apply.) o B1 B2 OE1 directed into the page O B1 directed out of the page 82 directed into the page O E2 directed out of the page o time spent in 61 > time spent in 2 o time spent in 81time spent in E2 O time spent in 1time spent in 2 Particle roundabout. The figure below shows 11 paths through a region of uniform magnetic field. One path is a straight line; the rest are half-circles. The table below gives the masses, charges, and speeds of 11 particles that take these paths through the field in the directions shown. Type the letter of the path in the figure which corresponds to each particle. Mass Charge Speed Path 2m 24

Explanation / Answer

A)

1)B1>B2 is true

we know that magnetic force = q (VxB)

in magnetic field B1 electron path is low compare with magnetic field B2. therefore magnetic field B1 produces more force than magnetic field B1.

but force is directly proportional to magnetic field

F1>F2

B1>B2

2)B1<B2 is false

3) B1=B2 is false

in B1 and B2

force is downwards

we know F=q(VxB)

for electron

F=-q(VxB)

if B1 is coming out of the paper then only the force will downwards

if B2 is going into the paper then only the force will downwards because the directionn of velocity is changed

therefore 4)B1 directed into the page is false

5)B1 directed out of the page is true

6)B2 directed into the page is true

7)B2 directed out of the page is false

in B1, force is more and path is low when compare with in B2

therefore electron spent more in B2 than B1

8)time spent in B1 > time spent in B2 is false

9)time spent in B1 < time spent in B2 is true

10)time spent in B1 = time spent in B2 is false

B)

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