SMD101m-week1.1

Which of the following is a base SI unit?

• Newton

• Joule

• Meter

• Pascal

The SI unit of acceleration is:

• m/s

• m/s²

• kg·m/s

• N·s

Which of the following is not a fundamental quantity in the SI system?

• Mass

• Temperature

• Length

• Force

Coulomb's law gives the force between:

• Two magnetic poles

• A charge and a magnetic field

• Two electric charges

• A current and a magnetic field

According to Coulomb’s law, the magnitude of the electric force between two point charges is:

• Directly proportional to the distance between them

• Inversely proportional to the product of the charges

• Directly proportional to the product of the charges and inversely proportional to the square of the distance

• Independent of the distance

Which statement is true about electric charge?

• Charge is created and destroyed in most interactions.

• Like charges attract; unlike charges repel.

• Charge is conserved in isolated systems.

• Charge has no relation to mass.

The SI unit of electric field is:

• N/m

• V·m

• N/C

• J/C

If the distance between two charges is d, and the electric force is F, what will the force be if the distance is halved?

• F/2

• 2F

• 4F

• F/4

The electric field at a point in space is defined as:

• The force per unit charge experienced by any charge at that point

• The force per unit positive test charge at that point

• The force per unit mass at that point

• The charge per unit area

If the electric field at a point is zero, then:

• No charges are present nearby

• The net electric force on any charge placed there is zero

• All nearby charges must be negative

• The potential is also zero at that point