Physics chapter 32 & 33

Like charges?

• Repel

• Attract

• Stay the same

• Lose and electron

Are metals good conductors ?

• False

• True

What is The SI unit for electric potential

• Volt

• Joules

• meters

Where does the energy stored in a capacitor come from?

• The car

• It comes from the work done to charge the capacitor.

• A common device where electrical energy can be stored.

Like a gravitational field, an electric field has both ____________ and ______________.

• force and direction

• magnitude and direction

What is electric potential?

• If the charge on a conductor is not moving, the electric field inside the conductor is exactly zero.

• Electrical potential energy per charge.

How can you represent an electric field?

• It is the energy a charge has due to its location in an electric field.

• By using electric field lines. Where the lines are farther apart, the field is weaker.

Which force—gravitational or electrical—repels as well as attract?

• both B & D

• Gravitation force

• power force

• Electrical force

Which has more mass—a proton or an electron?

• proton

• electron

• neutron

• nun

What is a semiconductor?

• Charge (measured in Coulombs)

• Act sometimes as insulators and sometimes as conductors

• Protons have a positive charge

• The electrons flow indefinitely; infinite conductivity