Homework #7
Either (Positively or Negatively)
A balloon will stick to a wooden wall if the balloon is charged
All of the above -pushes negative charge in the wall away from it. -pulls positive charge on the wall surface towards it. -polarizes molecules in the wall.
A negatively-charged balloon touching a wooden wall
Repel Each other
A pair of positively-charged plastic straws tend to
More current
Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will draw
Joules
Electric potential Energy is measured in units of
Volts
Electric potential is measured in units of
Repel or Attract
One main difference between gravitational and electric forces is that electric forces
Increases
Stretch a copper wire so that it is thinner and the resistance between its ends
Electrons
The electric current in a copper wire is normally composed of
Zero
The electric resistance of a superconductor is
Parallel
The headlights, radio, and defroster fan in an automobile are connected in
Positively
The nucleus of an atom is charged
Electrons that surround the nucleus
The number of protons in the nucleus of an electrically neutral atom is equal to the number of
Strands of hair become charges and repel one another
The reason that Lillianʹs hair stands out when her hand is on a charged Van de Graaff generator is
Has a single direction
To say a circuit is dc is to say that current in the circuit
It's charges have been rearranged
To say that an object is electrically polarized is to say
Can neither be created nor destroyed
To say that electric charge is conserved is to say that electric charge
The person's own body
When a person experiences an electric shock, the origin of the electrons comprising the shock is
Less than the resistance of either lamp
When two lamps are connected in parallel to a battery, the electric resistance that the battery senses is
Ionized
When you remove electrons from a metal cup, the cup becomes
Charge flows through a circuit
Which statement is correct?
