Practice - 3.3 Electric Charges

If the number of positive particles equals the number of negative particles, then an object is ​ (a)   .

• neutral
• positive
• negative

If the number of positive particles is greater than the number of negative particles, then an object is ​ (a)   .

• neutral
• positive
• negative

If the number of positive particles is less than the number of negative particles, then an object is ​ (a)   .

• neutral
• positive
• negative

Tags

NGSS.MS-PS2-3

An object has 3 positive particles and 2 negative ones. What is the overall charge?

Mathematical Equivalence

OFF

A neutral object has 12 positive particles. How many negative ones does it have?

Mathematical Equivalence

OFF

A negatively charged rod repels a balloon. What type of charge does the balloon have?

• neutral

• positive

• negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the charge of this object?

Mathematical Equivalence

OFF

Tags

NGSS.MS-PS2-3

When two objects contact each other, ​ (a)   can move from one object to the other. Magnetic fields are ​ (b)   electrical fields.

• electrons
• protons
• neutrons
• different from
• the same as

Tags

NGSS.MS-PS2-5

Positive charges are ​ (a)   to negative charges. Positive charges are ​ (b)   by positive charges. ​ (c)   objects can repel and attract positive objects.

• attracted
• repelled
• Neutral
• Positive
• Negative

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Label each object with the correct charge.

a

b

c

positive

negative

neutral