Question 1: What is the unit of electrical resistance?

Answer: Ohm

Question 2: True or False: Voltage is the force that pushes electric current through a conductor.

Answer: True

Question 3: State Ohm's Law.

Answer: Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Question 4: Which of the following increases when the resistance in a circuit is increased, assuming voltage remains constant?

Answer: None of the above

Question 5: Match the following terms to their definitions:

Answer: See full answer key

Question 6: Explain the effect of doubling the resistance in a circuit on the current, assuming constant voltage.

Answer: Doubling the resistance will halve the current if the voltage remains constant, according to Ohm's Law.

Question 7: True or False: Increasing the length of a wire will decrease its resistance.

Answer: False

Question 8: Calculate the current flowing through a circuit with a voltage of 12 V and a resistance of 4 Ω. Use Ohm's Law: V = IR.

Answer: 3 Amperes

Question 9: Order the following steps in calculating resistance using Ohm's Law: Measure the current, Calculate using V/I, Measure the voltage.

Answer: See full answer key

Question 10: Fill in the blank: The ______ is the device used to measure electrical current.

Answer: ammeter

Question 11: Discuss the relationship between voltage, current, and resistance in electrical circuits. Provide examples to illustrate your explanation.

Answer: The relationship between voltage, current, and resistance is defined by Ohm's Law, which states that the current through a conductor is directly proportional to the voltage and inversely proportional to the resistance. For example, doubling the voltage across a circuit while keeping the resistance constant will double the current. Conversely, doubling the resistance while keeping the voltage constant will halve the current.

Question 12: What happens to the total resistance in a series circuit if more resistors are added?

Answer: The total resistance increases.

Question 13: Multiple choice: Which of these is a correct application of Ohm's Law?

Answer: Increasing resistance decreases current if voltage is constant.

Question 14: Describe how resistance is affected by temperature in a conductor.

Answer: In most conductors, resistance increases with an increase in temperature due to the increased vibration of atoms in the conductor, which impedes the flow of electrons.