Physics F5: Experiment 3.2

What is the relationship between the length of a wire and its resistance?

• Inversely proportional

• Directly proportional

• No relation

• Exponentially related

Which law is used to calculate resistance in an electrical circuit?

• Newton’s Law

• Ohm’s Law

• Hooke’s Law

• Faraday’s Law

What happens to the resistance if the length of the wire is doubled?

• The resistance remains the same

• The resistance is halved

• The resistance doubles

• The resistance decreases slightly

What factors affect the resistance of a wire?

• Length, temperature, material, cross-sectional area

• Length, color, thickness, speed of electrons

• Length, diameter, magnetic field, humidity

• Voltage, current, power, weight

What is the unit of resistance?

• Ampere

• Ohm

• Volt

• Watt

Which apparatus is used to measure current in a circuit?

• Voltmeter

• Ammeter

• Ohmmeter

• Resistor

If a wire’s length increases but its thickness remains constant, what happens to its resistance?

• Resistance decreases

• Resistance increases

• Resistance stays the same

• Resistance fluctuates

In the experiment, which variable is the independent variable?

• Voltage

• Current

• Length of wire

• Resistance

Why is it important to use the same material for the wire during the experiment?

• Different materials have different densities

• Different materials have different levels of resistance

• Different materials can change the color of the wire

• Different materials affect the length of the wire