If the current enters the inductor from the bottom, can you tell if the current is increasing, decreasing, or staying the same? If so, which? Explain. Match the words in the left column to the appropriate blanks in the sentences on the right. It is impossible to know something about a change in current, even knowing that The current increases since The current decreases since The current remains the same remains the same increases decreases the potential from bottom to top of the inductors.

At what speed must the sliding rod in the figure below move to produce an emf of 1.10 V in a 1.77 T field, given the rod’s length is 31.0 cm?

Just after the switch is closed, what is the magnitude of the potential difference vabvab across the resistor R1? What is the magnitude of the potential difference vcdvcd across the inductor L? The switch is left closed a long time and then opened. Just after the switch is opened, what is the magnitude of the potential difference vabvab across the resistor R1? What is the magnitude of the potential difference vcdvcd across the inductor L?

As shown below, a wire loop with a radius of 0.84 m is immersed in a B-field (the direction of the field is shown in the diagram). The B-field decreases from 10 T to 6 T and as a result a 8 V voltage & a 8.1 A current are induced. Determine how long the B-field was changing & the loop's resistance. At = the loop's resistance = Ω

The switch K in the circuit shown in the figure is open, and there is no current in the coil. At a given moment we close the switch. a) Find the current and the voltage of the resistors and the coil right after the close of the switch. After waiting until the current becomes constant in the circuit, we open the switch. b) Find the current and the voltage of the resistors and the coil right after the open of the switch.