A resistor is connected between two parallel conducting wires. A nonferrous bar is placed across the two wires. The entire setup is placed in a uniform magnetic field. On paper, the wires are drawn horizontally and the magnetic field is out of the page. The bar is pulled to the left at a constant speed. Which direction is the current through the circuit formed by the resistor, wires, and bar?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

The least penetrating form of radiation is

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?