Electrical Test 1

What is voltage?

• Voltage is the flow of electrons in a circuit.
• Voltage is the brightness of a light bulb.
• Voltage is the resistance in an electrical system.
• Voltage is the difference in electric potential between two points, which is measured in volts.

What is Ohms Law?

• Ohm's Law is I = V / R, where I is current, V is voltage, and R is resistance.
• Ohm's Law is R = V / I, where R is resistance, V is voltage, and I is current.
• Ohm's Law is P = V * I, where P is power, V is voltage, and I is current.
• Ohm's Law is V = I * R, where V is voltage, I is current, and R is resistance.

What is the unit of electrical resistance?

• Ampere

• Volt

• Ohm

• Watt

What does the term 'current' in electrical circuits refer to?

• The resistance of the circuit

• The voltage across the circuit

• The flow of electric charge through a conductor

• The brightness of a light bulb connected to the circuit

Which of the following is a correct expression of Power in electrical terms?

• P = V / I, where P is power, V is voltage, and I is current

• P = I / V, where P is power, I is current, and V is voltage

• P = V * I, where P is power, V is voltage, and I is current

• P = I^2 * R, where P is power, I is current, and R is resistance

Which component is used to store electrical energy in an electrical circuit?

• Resistor

• Capacitor

• Inductor

• Transistor

Voltage is simply defined as...

• what 'pushes' electrons
• what 'stops' electrons
• moving electrons

If the resistance in a circuit is increased, what happens to the current, assuming the voltage remains constant?

• It increases

• It decreases

• It remains the same

• It becomes zero

What is an electric current? 

• the flow of electricity 
• electricity moving in only one direction
• a switch that gives power

Which of the following is NOT a good conductor of electricity?

• Copper

• Aluminum

• Rubber

• Gold