Intro to Electricity

Current electricity is produced when electrons flow in a conducting loop.

• true

• false

Rubbing two insulators like plastic balloon and a piece of cloth is an example of static electricity.

• yes

• no

The force that opposes and reduces the flow of electrical current is organized as ___

• Power

• Electromagnetism

• Resistance

• Frequency

A law that states that current is directly proportional to voltage and inversely proportional to resistance in known as ____

• PEC

• Kirchoff's Law

• Law of Resistivity

• Ohm's Law

In a neutral atom, the number of electrons is equal to the number of _______.

• Neutrons
• Orbits
• Protons
• subatomic particles

If two charges repel each other, the two charges must be

• positive and neutral

• positive and negative

• positive and neutral

• negative and negative

Tags

NGSS.MS-PS2-3

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An object becomes charged when the atoms in the object gain or lose

• electrons
• protons
• neutrons
• all of the above

Tags

NGSS.MS-PS2-3

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.
• the silk has become negatively charged.
• protons have moved to the rod.
• glass attracts more protons.

If you bring a charged object near an electrically neutral surface without allowing the object to touch the surface, the charges in the surface are rearranged by

• friction.
• convection.
• induction.
• conduction.

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NGSS.MS-PS2-3

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Objects that have opposite charges

• are attracted to each other, and the force between the objects pulls them together.
• are attracted to each other, and the force between the objects pushes them apart.
• are repelled by each other, and the force between the objects pulls them together.
• are repelled by each other, and the force between the objects pushes them apart.  

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5