An electron is accelerated from rest through a potential difference 250 V. The electron enters a region of uniform magnetic field and travels along circular path of radius 3.0 cm. If the magnetic field is perpendicular to the velocity vector of the electron. Answer questions 15, 16, and 17. Q15. The magnitude of the speed of the electron (in x 106m/s) once it enters the magnetic field is: A) 5.3 B) 9.4 C) 11.9 D) 1.5 E) 3.0

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Chapter30: Sources Of The Magnetic Field
Section: Chapter Questions
Problem 30.9P: Two long, straight, parallel wires carry currents that are directed perpendicular to the page as...
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Q 15 please
An electron is accelerated from rest through a potential difference 250 V. The electron enters a region of
uniform magnetic field and travels along circular path of radius 3.0 cm. If the magnetic field is perpendicular to
the velocity vector of the electron. Answer questions 15, 16, and 17.
Q15. The magnitude of the speed of the electron (in x 106m/s) once it enters the magnetic field is:
A) 5.3
B) 9.4
C) 11.9
D) 1.5
E) 3.0
Q16. The magnitude of the magnetic field (in mT) is:
A) 3.3
B) 2.8
C) 1.8
D) 41.5
Q17. The angular speed (in x 108 rad/s) of the electrons is:
A) 5.0
B) 6.6
C) 9.9
D) 2.8
Consider a series RC circuit for which R = 3.00 M2, C = 5.00 μF,
and & = 30.0 V. Answer questions 18, 19, and 20.
Q18. What the time constant (in s) of the circuit?
A) 3.6
B) 15.0
C) 0.15
D) 5.00
E) 9.2
Q19.- Find the maximum charge (in µC) on the capacitor after the
switch is thrown closed.
A) 60.0
B) 200
C) 150
D) 80
E) 50
Q20. Find the current (UA) in the resistor 10.0 s after the switch is closed.
A) 3.4
B) 17
C) 18
D) 8.5
E) 5.1
C:
E) 9.3
E) 3.1
S
E
R
www
Transcribed Image Text:An electron is accelerated from rest through a potential difference 250 V. The electron enters a region of uniform magnetic field and travels along circular path of radius 3.0 cm. If the magnetic field is perpendicular to the velocity vector of the electron. Answer questions 15, 16, and 17. Q15. The magnitude of the speed of the electron (in x 106m/s) once it enters the magnetic field is: A) 5.3 B) 9.4 C) 11.9 D) 1.5 E) 3.0 Q16. The magnitude of the magnetic field (in mT) is: A) 3.3 B) 2.8 C) 1.8 D) 41.5 Q17. The angular speed (in x 108 rad/s) of the electrons is: A) 5.0 B) 6.6 C) 9.9 D) 2.8 Consider a series RC circuit for which R = 3.00 M2, C = 5.00 μF, and & = 30.0 V. Answer questions 18, 19, and 20. Q18. What the time constant (in s) of the circuit? A) 3.6 B) 15.0 C) 0.15 D) 5.00 E) 9.2 Q19.- Find the maximum charge (in µC) on the capacitor after the switch is thrown closed. A) 60.0 B) 200 C) 150 D) 80 E) 50 Q20. Find the current (UA) in the resistor 10.0 s after the switch is closed. A) 3.4 B) 17 C) 18 D) 8.5 E) 5.1 C: E) 9.3 E) 3.1 S E R www
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