PHY150 (EXERCISE: CHAPTER 1-4)

Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.

• -1.5E-11 N

• 2.5E11 N

• -2.5E11 N

• -7.5E-10 N

Recap:

Coulomb’s law states that the force between two charged objects will __________ when the magnitude of the object’s charge increases.

Coulomb’s law also states that the force between two charged objects will __________ when the distance between objects increases.

• increase; increase

• increase; decrease

• decrease; increase

• decrease; decrease

What equation is this:
F_E= (k*q₁*q₂) / r² 

• Coulombs law
• Ohms law
• Newtons law

Which statement best describes the electric fields in the image?

• The charges are neutral.

• Both charges are negative, so the field lines are alike.

• The field lines move toward a positive charge and away from a negative charge.

• The field lines move away from a positive charge and toward a negative charge.

• A

• B

• C

• D

The figure to the right represents:

• Capacitor
• Diode
• Inductor
• Resistor

Which of the following is true about the conservation of charges?

• total charge in an isolated system is constant

• charge in quantised

• Q=ne

• charge is not conserved

Based on the arrangement of the electric field lines in the diagram, what are the charges?

• both charges are the same

• the charges are opposite

• they are neutral; no charge

Find the total resistance of the circuit

• 25Ω

• 75Ω

• 100Ω

• 18.75Ω

What is the total resistance of this circuit

• .18Ω

• 5.45Ω

• 60Ω

• 6000Ω