Intro to Electricity

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

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

NGSS.MS-PS2-5

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

• electrons

• protons

• neutrons

• all of the above

Tags

NGSS.MS-PS1-1

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.

Tags

NGSS.MS-PS2-5

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-PS2-5

Charging by ____ occurs when electrons are transferred from one object to another by direct contact.

• reduction

• induction

• conduction

• friction

Two unlike charges_________

• Attract each other

• Neutralize each other

• Repel each other

• Have no effect on each other

Tags

NGSS.MS-PS2-3

Earthing is a safety measure that connects the metal parts of an appliance to the ____________.

• earth/ground

• cement

What is an electrical circuit?

• a whole bunch of wires

• a complete, unbroken path through which electric charges flow

• a broken path that electric charges can flow