PS Electricity & NCFE Review

If Bulb 1 burns out, which other bulb(s) will also stop emitting light?

• 2

• 3

• 3 and 4

• 2, 3, and 4

A generator converts mechanical energy to electrical energy by using a conducting metal loop turning in a

• gravitational field.

• magnetic field.

• steel sphere.

• copper sphere.

A copper wire is connected across a constant voltage source. Which change will cause an increase in the current flowing through the wire?

• an increase in the length of the wire

• an increase in the resistance of the wire

• an increase in the diameter of the wire

• an increase in the insulation around the wire

A Tyrannosaurus rex did 107 kJ of work to lift its dinner, a 2721-kg hadrosaur, from the ground. To what height did the Tyrannosaurus rex raise the hadrosaur?

• 2.5 m

• 2.7 m

• 3.0 m

• 4.0 m

  
  

How does the energy of ultraviolet radiation compare to the energy of microwaves?

• Ultraviolet radiation has less energy than microwaves, because ultraviolet radiation has a lower frequency.

• Ultraviolet radiation has more energy than microwaves, because ultraviolet radiation has a higher frequency

• Microwaves have less energy than ultraviolet radiation, because microwaves have shorter wavelengths.

• Microwaves have more energy than ultraviolet radiation, because microwaves have longer wavelengths.

If Bulb 8 burns out, how will the remaining bulbs be affected?

• All the remaining bulbs stay lit.

• Only bulbs 1 through 4 stay lit.

• All the remaining bulbs go out.

• Bulb 4 is the only other bulb to go out.

A circuit has 2.25 amps of current and a resistance of 4.00 Ω. What is the voltage difference across the circuit?

• 9.00 V

• 6.25 V

• 1.78 V

• 0.56 V

A student removed a wool hat from her head. Her hair stood up from static electricity. What did her hat do to cause this?

• gave her hair a neutral charge

• removed protons from her hair

• gave her hair a negative charge

• removed electrons from her hair

The diagram below is the Bohr model of an atom. Which best describes this atom?

• It has 6 electrons.

• It has a positive charge.

• It has 6 valence electrons.

• It has 5 protons

The drawings represent the particles in a sample of matter that underwent a change in state. Based on the drawings, the change in state was MOST likely

• liquid to gas.

• liquid to solid.

• solid to gas.

• solid to liquid.