Multiple-Choice Questions on Electricity

Michael is conducting an experiment in his physics lab to measure the flow of electric charge through a circuit. He needs to determine the SI unit of electric charge to properly record his findings. What is the SI unit of electric charge?

• Ampere

• Coulomb

• Volt

• Ohm

Nora and Mason are conducting an experiment in their physics lab. They have two positive charges, one of 2 µC and the other of 3 µC, placed 0.1 m apart on their lab table. What is the force between them? (Use Coulomb's constant, k ≈ 9 × 10⁹ N·m²/C²)

• 5.4 N (repulsive)

• 5.4 N (attractive)

• 0.54 N (repulsive)

• 0.54 N (attractive)

Evelyn is conducting an experiment with a positive point charge. She observes the behavior of small test charges placed around it. What is the direction of the electric field due to this positive point charge?

• Toward the charge

• Away from the charge

• Parallel to the charge

• Zero everywhere

In a series circuit with resistors of 4 Ω and 6 Ω connected to a 12 V battery, what is the total current?

• 1.2 A

• 2 A

• 0.83 A

• 3 A

Charlotte is working on a science project about electrical conductivity. She needs to choose a material that will allow electricity to flow easily for her project. Which of the following materials should she select?

• Rubber

• Glass

• Copper

• Plastic

Isla is conducting an experiment with an ideal solenoid. She wants to understand how the magnetic field inside the solenoid changes as she varies the current flowing through it. What is the magnetic field inside the solenoid proportional to?

• The square of the current

• The current through the solenoid

• The inverse of the number of turns

• The length of the solenoid

What is the potential difference across a 5 Ω resistor if a current of 2 A flows through it?

• 2.5 V

• 10 V

• 7 V

• 0.4 V

Which law describes the force between two current-carrying wires?

• Coulomb's Law

• Ohm's Law

• Ampere's Law

• Faraday's Law

What happens to the capacitance of a parallel-plate capacitor if the distance between the plates is doubled?

• Doubles

• Halves

• Remains the same

• Quadruples

An electron moves perpendicular to a uniform magnetic field. What is the path of its motion?

• Straight line

• Circular

• Parabolic

• Elliptical