Question

What is the relationship between voltage and current (assuming the resistance stays the same)?(4 points)

If the voltage increases, the current increases

If the voltage decreases, the current increases

Voltage does not affect current
You can decrease resistance by making the wire in a circuit smaller.(2 points)

True

False
The current running through a circuit is 10 amps from a 5 V battery. Calculate the resistance.(4 points)

50 Ohms

2 Ohms

0.5 Ohms

Not enough information

Answer 1

1) Relationship between voltage and current (resistance constant): If the voltage increases, the current increases.
Reason: Ohm’s law I = V/R, so I is directly proportional to V.

2) "You can decrease resistance by making the wire in a circuit smaller.": False.
Reason: Making a wire "smaller" (thinner/less cross-sectional area) increases resistance; shorter length decreases resistance.

3) Current 10 A from 5 V battery — resistance: 0.5 Ohms.
Calculation: R = V/I = 5 V / 10 A = 0.5 Ω.