Electricity and Megnetism Test

Front

What is needed to create an electromagnet?

Back

A battery, a coil of wire, and a nail.

Front

What happens to an object when it becomes positively charged?

Back

It loses electrons.

Front

What is static electricity?

Back

It is the buildup of charges (more of one type of charge) on an object.

Front

In which direction do electrons flow in a circuit?

Back

From the negative terminal to the positive terminal.

Front

What is the formula to calculate resistance?

Back

Resistance (R) = Voltage (V) / Current (I).

Front

What resistance is needed to cause a 50A current flow because of a 500V battery?

Back

10Ω.

Front

What is current electricity?

Back

It is the flow of electric charge through a conductor.

Front

What is the unit of electric current?

Back

Ampere (A).

Front

What is the role of a battery in an electric circuit?

Back

It provides the voltage needed to push electric charges through the circuit.

Front

What is Ohm's Law?

Back

It states that the current through a conductor between two points is directly proportional to the voltage across the two points.