I took the quick check so here's the answers :)
1. How do you find the total resistance, Rtotal, for a series circuit with resistances R1, R2, and R3?
Answer: Rtotal = R1 + R2 + R3
2. Which statement correctly describes the resistivity of a wire?
Answer: Resistivity depends on the material the wire is made from and has units of ohm-meters.
3. Which representation shows the relationship between resistance and the length of a wire?
Answer: R∝L
4. About how many times greater is the resistance of a tungsten wire than the resistance of a silver wire of the same length and cross-sectional area?
Answer: 3.52
5. The resistance of a wire is 8 Ω8 Ω. What would the resistance be if the length of the wire was increased by a factor of four?
Answer: 32 Ω
6. What current is produced with a voltage of 6.0 V and a resistance of 445 ohms?
Answer: 13.5 mA
7. What is the voltage across a resistor with a resistance of 10 ohms and a current of 0.5 A?
Answer: 5 V