Question

1. Electric charge is

A property of matter that is distinct from energy, momentum, mass, velocity, and acceleration.

A property of matter that is determined by the energy of an object.

A property of matter that related directly to the momentum of an object.

2.

After rubbing a plastic ruler with a felt cloth, the ruler becomes negatively charged because:

The cloth destroyed positive charges in the ruler.

The kinetic energy lost to friction was converted into positive charges.

The negative charges were transferred from the cloth to the ruler.

The positive charges were transferred from the cloth to the ruler.

The potential energy lost to friction was converted into negative charges. 3. Electric charge is conserved, meaning _______. a neutral object can never be separated into two charged objects. the net amount of electric charge produced in any process is zero. we must be careful not to waste charge.

4.  

Metals are typically ______________,
they allow charge to move freely.
Materials like wood, rubber, and plastic are _______________,
they do not allow charges to move freely.

conductors, insulators

insulators, conductors

conductors, semiconductors

semiconductors, conductors

semiconductors, insulators

5.

When a negatively-charged object is brought close to a neutral conductor, but does not touch it, what happens?

The free electrons in the conductor move closer to the negatively charged object, separating the charge in the conductor so it is more positive near the object.

The free electrons in the conductor move away from to the negatively charged object, separating the charge in the conductor so it is more positive near the object.

None of the above.

Answer 1

Ans

1. Electric charge is

A property of matter that is distinct from energy, momentum, mass, velocity, and acceleration.

Explanation: Electric Charge is a unique property of matter.

2. After rubbing a plastic ruler with a felt cloth, the ruler becomes negatively charged because:

The negative charges were transferred from the cloth to the ruler.

Explanation: Ruler is a bad conducter ( uncharged). It can be negatively charged if the negative charges were transferred from the cloth to the ruler.

3.  Electric charge is conserved, meaning _______.

a neutral object can never be separated into two charged objects.

Explanation: From Conservation of charge theory we know that charge can not be created or destroyed.

4. Metals are typically   conductors

they allow charge to move freely.
Materials like wood, rubber, and plastic are  insulators,
they do not allow charges to move freely.

5. When a negatively-charged object is brought close to a neutral conductor, but does not touch it, what happens?

The free electrons in the conductor move away from to the negatively charged object, separating the charge in the conductor so it is more positive near the object.

Explanation :

When a negatively-charged object is brought close to a neutral conductor , the free electrons within the neutral conductor which are closed to the negatively charged object will be repelled due to the negative charge present in the object and therefore conductor will be more positive near the object.