2. A series circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. If the generator supplies a voltage of 42 V, what is the magnitude of the current?
A. 3 A
B. 1.75 A
C. 2 A
D. 1.33 A
3. When all parts of a circuit are composed of conducting materials, the circuit is said to be
A. parallel.
B. closed.
C. open.
D. shorted
4. Suppose you have two magnets. Magnet A doesn't have its poles labeled, but Magnet B does have a clearly labeled north and south pole. If these two are brought into contact with one another, which of the following could you expect?
A. The side of Magnet A that's repelled by Magnet B's north pole must be Magnet A's south pole.
B. The side of Magnet A that's attracted to Magnet B's south pole must be Magnet A's north pole.
C. The side of Magnet A that's repelled by Magnet B's south pole must be Magnet A's north pole.
D. The side of Magnet A that's attracted to Magnet B's north pole must be Magnet A's north pole
