EOC: Practice 2

Which on of the formulas describes electrical voltage.

• V = I*R

• V = I/R

• V = R/I

• V = √(I*R)

Which of the following describes an generator.

• a devices that turn mechanical energy into electric energy.

• a device that turn electric energy into mechanical energy.

Which of the following definitions describes non-renewable energy?

• Sources that can be replaced once used

• Sources that can never be entirely consumed

• Sources that cannot be replaced once used

• Energy sources that are not constant

Which on of the Ohm's Law equations describes electrical current.

• I = R/V

• I = V*R

• I = V/R

• I = √(V/R)

Which of the following describes an electrical motor.

• a devices that turn mechanical energy into electric energy.

• a device that turn electric energy into mechanical energy.

Which of the following is NOT a devices that use alternative energy systems to produce electrical power

• Wind Turbines

• Solar Cells

• Hydrogen Fuel Cell

• Natural gas fired power plants

Calculate the amount of effort force a person has to exert on the pulling rope from a pulley system with a configuration similar to the one in the next figure.

• 20 lb

• 30 lb

• 40 lb

• Not here