Electricity

Question 1

Electromagnets rely on electric currents passing through coils of wire to generate a magnetic field.

Accepted Answer

True

Question 2

Electric current can have various effects on the human body. At what current level can it cause injury or harm?

Accepted Answer

10 milliamps

Question 3

The potential energy in an electric system, which allows it to perform work, is measured in what unit?

Accepted Answer

Volts

Question 4

The electric field is the force per unit charge. Which scientist contributed significantly to its study?

Accepted Answer

Michael Faraday

Question 5

Lightning is one of nature's most dramatic electric phenomena. What voltage can a single lightning strike produce?

Accepted Answer

Over 1 billion volts

Question 6

James Clerk Maxwell formulated the theory explaining the waves created by oscillating electric and magnetic fields.

Accepted Answer

Electromagnetic waves

Question 7

The ancient Greeks studied electrical phenomena. What did they observe when rubbing amber?

Accepted Answer

It attracted light objects, like feathers (static electricity)

Questions 7