Electrical charging can occur by

• Friction
• Conduction
• Induction
• All of these

The net charge of a typical atom is

• # of protons in the nucleus
• # of electrons surrounding the nucleus
• Zero if the atom is neutral
• Always zero

When you brush your hair you scrape off electrons, and your hair

• becomes positively charged
• becomes negatively charged
• becomes positively and negatively charged
• remains uncharged, or neutral

Tags

NGSS.HS-PS2-4

When we say charge is conserved, we mean that charge can

• only be transferred from one place to another
• transform into equivalent forms
• be created or destroyed

As a pair of charges is brought close together, the force between them

• Increases
• Decreases
• Increases only if they are the same sign
• Increases only if they are the opposite sign

When a negatively charged balloon is brought close to a wall, the positive charges in the wall are

• attracted to the balloon
• repelled from the balloon
• too bound to be affected by the balloon
• neutralized

If a storm cloud is negatively charged on bottom, and equally as positively charged on top

• the net charge is negative
• the net charge is positive
• the net charge is zero

If the same storm cloud passes over a patch of flat ground, the ground becomes

• negatively charged
• positively charged
• remains neutral

Gravitational force depends on mass.  What comparable quantity governs the electrical force?

• Volume
• Density
• Charge
• Charge density

Is an electron in a Uranium atom the same as an electron in a Hydrogen atom?

• Yes
• No
• Yes, but only when both atoms are neutral
• Yes, but only when they are equidistant from the nucleus