2. a) What is the magnitude and direction of the magnetic field at point P in th
ID: 1403936 • Letter: 2
Question
2. a) What is the magnitude and direction of the magnetic field at point P in the diagram?
a) 4.5 × 10-5 T in the page
b) 4.5 × 10-5 T out of the page
c) 3.0 × 10-6 T in the page
d) 3.0 × 10-6 T out of the page
e) 1.2 × 10-7 T in the page
b) If an electron is moving to the right (+x direction) at a speed of 2.5 km/s at the moment when it is at point P, what is the acceleration of the electron?
i. 1.2 x 10-21 m/s2 towards the top of the page
ii. 1.2 x 10-21 m/s2 towards the bottom of the page
iii. 1.32 x 109 m/s2 towards the top of the page
a) 4.5 × 10-5 T in the page
b) 4.5 × 10-5 T out of the page
c) 3.0 × 10-6 T in the page
d) 3.0 × 10-6 T out of the page
e) 1.2 × 10-7 T in the page
Explanation / Answer
iv. 1.32 x 109 m/s2 towards the bottom of the page
F=ma= evB Sin =9.11x10-31xa=(1.6x10-19)x(2500x0.3x10-5xsin 90)
a=((1.6x10-19)x(2500x0.3x10-5xsin 90))/ 9.11x10-31
a=1.318x109m/s2
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