Homework Clinic
Science Clinic => Physics => Topic started by: theo on Jul 29, 2018
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A solenoid with 400 turns has a radius of 0.040 m and is 40 cm long.
If this solenoid carries a current of 12 A, what is the magnitude of the magnetic field near the center of the solenoid? (0 = 4 10-7 T m/A)
A) 16 mT
B) 4.9 mT
C) 15 mT
D) 6.0 mT
E) 9.0 mT
Question 2
A 1000-kg car is moving at 15 km/h. If a 2000-kg truck has 23 times the kinetic energy of the car, how fast is the truck moving?
A) 51 km/h
B) 72 km/h
C) 61 km/h
D) 41 km/h
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Answer to Question 1
C
Answer to Question 2
A