A flat circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T
Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are parallel.
A) 3.1 × 10-3 T ? m2 B) 0 T ? m2 C) 5.5 × 10-3 T ? m2 D) 6.3 × 10-3 T ? m2
B
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The net force acting on a body gives the direction of the ________ of the body.
Fill in the blank(s) with the appropriate word(s).
A ball at the end of a string is swinging as a simple pendulum. Assuming no loss in energy due to friction, we can say for the ball that
A. the kinetic energy does not change but the potential energy does. B. the mechanical energy changes and is maximum where the kinetic energy is minimum. C. the potential energy is maximum at each end of the motion. D. the mechanical energy changes and is maximum where the kinetic energy is maximum.
Two solenoids, A and B, are wound using equal lengths of the same kind of wire. The length of the axis of each solenoid is large compared with its diameter. The axial length of A is twice as large as that of B, and A has twice as many turns as B. What is the ratio of the inductance of solenoid A to that of solenoid B?
1.4 2.2 3.1 4.1/2 5.1/4
A reasonable estimate for the mass of an ordinary passenger car is
A) 100 kg B) 1000 kg C) 5000 kg D) 10,000 kg