Faraday's Law: As shown in the figure, a uniform magnetic field B is confined to a cylindrical volume of radius 0.050 m. This field is directed into the plane of the page and is increasing at a constant rate of 0.900 T/s. Calculate the magnitude and direction (clockwise or counterclockwise) of the current induced in a circular wire ring of radius 0.16 m and resistance 7.1 ? that encircles the magnetic field region.
What will be an ideal response?
1.0 × 10-3 A, counterclockwise
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Which of these is emitted when an electron falls from a higher to lower orbital?
A) a photon B) a positron C) a neutrino D) a graviton E) another electron
A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the puck and the ramp are µs = 0.40 and µk = 0.30,
and the puck's initial velocity at the base is 3.8 m/s parallel to the sloping surface of the ramp. What speed does the puck have when it slides back down to its starting point?
Velocity: When is the average velocity of an object equal to the instantaneous velocity?
A. only when the velocity is increasing at a constant rate B. only when the velocity is decreasing at a constant rate C. when the velocity is constant D. always E. never
A ventilation fan with a moment of inertia of 0.034 kg·m2 has a net torque of 0.11 N·m applied to it. If it starts from rest, what angular momentum will it have 9.0 s later?
a. 0.88 kg·m2/s b. 0.99 kg·m2/s c. 2.0 kg·m2/s d. 3.3 kg·m2/s