The magnetic field in the figure is decreasing at the rate 0.8 T/s . (Figure 1)

Question

The magnetic field in the figure is decreasing at the rate 0.8 T/s . (Figure 1)

Part A

What is the magnitude of the acceleration of a proton at rest at point a?

Express your answer to two significant figures and include the appropriate units

Part B

What is the direction of the acceleration of a proton at rest at point a?

Part C

What is the magnitude of the acceleration of a proton at rest at point b?

Express your answer as an integer and include the appropriate units.

Part D

What is the direction of the acceleration of a proton at rest at point b?

Explanation / Answer

A)

let E is the electric field at point a,

induced emf = A*dB/dt

E*2*pi*r = pi*r^2*dB/dt

E = (r/2)*dB/dt

= (0.01/2)*0.8

= 0.004 N/c

Apply, F = q*E

m*a = q*E

a = q*E/m

= 1.6*10^-19*0.004/(1.67*10^-27)

= 3.83*10^5 m/s^2

B) upward

c) a = 0

D) a = 0

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