Introduction to Electricity

Multiple Choice

What are the basic parts of a SIMPLE CIRCUIT?

• Battery and wires

• Battery and Load

• Battery, wire, and Load

• Wire and Load

Multiple Choice

True or False: In a DC Circuit, electricity can flow back and forth.

• False
• True
• Sometimes
• Only on weekends

Multiple Choice

In a waterfall, the water flows unperturbed. In a circuit, what do you call the flow of charges within a wire?

• Voltage

• Current

• Resistance

• Power

Multiple Choice

In a waterfall, the height difference causes the water to fall down. In a circuit, what causes electricity to flow from one terminal to the other?

• Voltage

• Current

• Resistance

• Power

Multiple Choice

In a waterfall, the some rocks block the fall and flow of water. In a circuit, what stops electricity from flowing undisturbed?

• Voltage

• Current

• Resistance

• Power

Multiple Choice

Given this equation, what happens to resistance if the area is doubled?

• Resistance stays the same
• Resistance is doubled

• Resistance becomes negative
• Resistance is halved

Multiple Choice

Using Ohm's Law, how would you calculate for the Resistance?

• R=V/I

• R=I/V

• R=VI

• None of the above

Multiple Choice

Using Ohm's Law, how would you calculate for the Voltage?

• V=R/I

• V=I/R

• V=IR

• None of the above

Multiple Choice

An electrical device with a potential difference of 15 V across its ends provides thermal energy at a rate of 723 W.

  a) What is its resistance?

• 0.122 Ohm

• 0.311 Ohm

• 0.412 Ohm

• 0.511 Ohm