Technologies Electricity & Magnetism

The potential energy of an electric current is measured in units of 

• amperes
• ohms
• volts
• watts

An electrical wire gets hot when operating because of 

• current
• power
• resistance
• voltage

The electrical conductivity of a substance depends on the ability of the _______ in it to move.

• electrons
• neutrons
• protons
• quarks

Tags

NGSS.HS-PS2-5

What process is the method by which a neutral object obtains an electrical charge? 

• convection
• discharge
• induction
• radiation 

Pretend you are an electron in a copper wire which is being used to connect a battery to a flashlight bulb. Because this circuit uses a(n) ________ current, you as the electron in the wire will 

• alternating, move first one way then the other
• direct, move first one way then the other
• alternating, move only in one direction
• direct, move only in one direction

Pretend you are an electron flowing through this circuit and you are with a group of other electrons. Suddenly you come to the "fork in the road" and you and some of the other electrons are temporarily separated. A short while later, you are back together with the other electrons. This type of circuit is called a(n) _______ circuit. 

• closed
• open
• parallel 
• series

In order for a light bulb to be on, the circuit must be 

• closed
• open
• parallel
• series

Which circuit contains the GREATEST voltage?

• A circuit with 20 amps and a resistance of 16 ohms
• A circuit with 10 amps and a resistance of 10 ohms
• A circuit with 25 amps and a resistance of 16 ohms 
• A circuit with a current of 20 amps and a resistance of 10 ohms 

Tags

NGSS.HS-PS3-5

Choose the false statement regarding resistance. 

• Longer wires have less resistance
• Electrical resistance produces heat.
• Resistance slows the flow of current
• The larger the diameter, the wire, the less resistance.

A battery-operated DVD player uses 12 DC volts from AA batteries and draws a current of 3 A. Calculate the resistance. 

• 4 ohms 
• 9 ohms
• 15 ohms
• 36 ohms