Faraday's Law: As shown in the figure, a wire and a 10-? resistor are used to form a circuit in the shape of a square with dimensions 20 cm by 20 cm. A uniform but non-steady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is steadily decreased from 2.70 T to 0.90 T in a time interval of 96 ms. What is the induced current in the circuit, and what is its direction through the resistor?
A. 75 mA, from b to a
B. 45 mA, from b to a
C. 75 mA, from a to b
D. 45 mA, from a to b
E. 110 mA, from a to b
Answer: A
You might also like to view...
If a compound is solid, has a high melting point, conducts electricity in the liquid phase, and dissolves in water, it is most likely to be a(n)______________ compound
a. intermediate b. organic c. covalent d. ionic
What is the process that physically transfers heat from a lower (hotter) to a higher (cooler) level?
A) radiation B) translation C) convection D) reflection E) conduction
How would you describe the distribution of galaxies in your Local Group?
A.) They just look randomly distributed. B.) There are the two big galaxies, and then the dwarfs seem to be clustered around them. C.) The big galaxies are together at the center and the dwarfs are in a big circle around them. D.) The dwarfs are in the center clustered together and the two big galaxies are off to the side. E.) The two larger galaxies are on one side of the group and all the dwarfs are on the other side.
A light-weight potter's wheel, having a moment of inertia of is spinning freely at 40.0 rpm. The potter drops a small but dense lump of clay onto the wheel, where it sticks a distance 1.2 m from the rotational axis
If the subsequent angular speed of the wheel and clay is 32 rpm, what is the mass of the clay? A) 3.7 kg B) 4.6 kg C) 4.2 kg D) 2.8 kg