Electrostatic discharge that usually occurs during a thunderstorm

Lenz's Law: A bar magnet is oriented above a copper ring, as shown in the figure. If the magnet is pulled upward, what is the direction of the current induced in the ring, as viewed from above?

A. There is no current in the ring. B. counterclockwise C. clockwise

A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. The corresponding Celsius temperature is:

A. 574? C B. 232? C C. 301? C D. 614? C E. 276? C

The direction of the force on a current-carrying wire in a magnetic field is

A) in the direction opposite to the current. B) perpendicular only to the current. C) perpendicular only to the magnetic field. D) in same direction as the current. E) perpendicular to both the current and the magnetic field.

If you connect two identical storage batteries together in series ("+" to "-" to "+" to "-"), and place them in a circuit, the combination will provide

A) zero volts. B) twice the voltage, and different currents will flow through each. C) twice the voltage, and the same current will flow through each. D) the same voltage, and different currents will flow through each. E) the same voltage, and the same current will flow through each.