Physics 12-4 Electric Circuits & Power

What was the first battery made of?

• zinc, silver, and saltwater

• copper, zinc, and vinegar

• glass, metal, and saltwater

• copper, silver, and vinegar

What states that resistance is equal to the voltage divided by the current?

• Ohm's Law

• Newton's Law

• Pascal's Law

• Volt's Law

What kind of electric circuit has only one path for current to take?

• series circuit

• parallel circuit

• static circuit

• short circuit

What device is used to measure current?

• ammeter

• voltmeter

• ohmmeter

• currentmeter

What type of electric circuit has multiple paths for current to take?

• parallel circuit

• series circuit

• static circuit

• short circuit

What device is used to measure voltage, or electrical potential energy difference?

• voltmeter

• ammeter

• ohmmeter

• currentmeter

What is the rate at which energy is transformed from one form to another called?

• power

• voltage

• energy

• electricity

What three related electrical factors did Georg Ohm investigate?

• current, resistance, and voltage

• voltage, power, and current

• resistance, power, and voltage

• none of these

The current through a resistor is 0.025 A when it is connected to a 10 V voltage source. What is the resistance?

(HINT: Use VCR)

• 0.25 ohms

• 0.0025 ohms

• 400 ohms

• 40 ohms

A refrigerator uses a standard voltage of 120 V and has a current of about 4.2 A. What is its power rating?

(HINT: Use PVC)

• 504 Watts

• 28.6 Watts

• 0.035 Watts

• 80 Watts