Week 1 EG1

What is voltage?

• The flow of electric current

• Electric pressure or electromotive force

• The resistance in a circuit

• The power consumed by a device

Which of the following is NOT a correct comparison for a coulomb?

• Gallon

• Apples

• Oranges

• Desk

How did James Watt justify charging a premium for his steam engines?

• By comparing his machine to a horse

• By comparing his machine to a car

• By comparing his machine to a train

• By comparing his machine to a plane

Using the formula E = I x R, what is the voltage of an electrical circuit with 5 ohms of resistance and 10 amps of current flow?

• 50 volts

• 5 volts

• 10 volts

• 25 volts

If the voltage is 120 volts and the resistance is 6 ohms, what is the current?

• 20 amps

• 10 amps

• 15 amps

• 5 amps

If the voltage is 300 volts and the resistance is 15 ohms, what is the current?

• 20 amps

• 25 amps

• 15 amps

• 10 amps

If the current is 8 amps and the voltage is 64 volts, what is the resistance?

• 8 ohms

• 10 ohms

• 12 ohms

• 6 ohms

In the formula P = I x E, what does 'I' represent?

• Voltage

• Power

• Resistance

• Current

What is the unit of measurement for current?

What is the relationship between power, voltage, and current according to the formula P = I x E?

• Power is the product of voltage and current

• Power is the sum of voltage and current

• Power is the difference between voltage and current

• Power is the ratio of voltage to current