Chapter 4 Test

The statement that current is equal to the voltage difference divided by the resistance is know as ______.

• Einstein's equation

• Faraday's Law

• Newton's Law

• Ohm's Law

A path that allows only one route for an electric current is called a ____.

• parallel circuit

• parallel current

• series circuit

• series current

The rate at which an electrical device converts energy from one form to another is called ____.

• electrical energy

• electrical power

• electrical resistance

• voltage regulation

A static discharge differs from an electric current in that a static discharge

• involves the movement of ions as well as electrons

• is a flow of electrons

• lasts for only a fraction of a second

• results because a force is exerted on the electrons

Lightning is ____.

• a buildup of neutrons

• harmless

• a high voltage electric current

• a large discharge of static electricity

The carbon rod in a standard D-cell serves as ____.

• an insulator to prevent electric shock

• part of the chemical reaction

• a negative terminal

• a conductor to transfer electrons

Which of the following is the correct relationship among power, current, and voltage?

• P=I/V

• V=P x I

• P= I x V

• E= P x I

Which of the following is a device designed to open an overloaded circuit and prevent overheating?

• circuit breaker

• magnet

• resistor

• transformer

A device that increases or decreases voltage in a power line is a ____.

• commutator

• generator

• motor

• transformer

The location of the strongest magnetic forces is the _____.

• electromagnets

• magnetic domains

• magnetic fields

• magnetic poles