Electromagnetism and Current Electricity Review

Two charges of 2.0 C and 3.0 C are placed 0.50 m apart. What is the magnitude of the force between them?

k = 9 x 10⁹

• 2.16 x 10^11 N
• 5.0 x 10^9 N
• 3.0 x 10^12 N
• 1.5 x 10^10 N

Two charges of 4 x 10^-6 and 5 x 10^-6 are separated by a distance of 2.0 x 10^-1 . What is the magnitude of force between them?

• 1.8 N
• 4.5 N

• 6.3 N
• 2.5 N

Is this circuit series or parallel?

• Series

• Parallel

Is this circuit series or parallel?

• Series

• Parallel

What is the total resistance of this circuit?

• 15

• 18

• 3

• 150

Calculate the total current of this series circuit.

I = V/R

• 17 amps

• 2.0 amps

• 162 amps

• 0.5 amps

Given the voltage and current shown in the circuit diagram, how much power is being delivered?

current = 0.5 amps

P = V(I)

• 4.5 watts

• 18 watts

• 0.05 watts

• 27 watts

A circuit has a current of 3.0 A flowing through a 5.0 Ω resistor.

How much power is dissipated by the resistor?

V = I(R)

P = V(I)

• 15

• 30

• 75

• 45

300 Volts powers a circuit with 100 amps current. What is the total resistance of the circuit?

V = I(R)

• 3 ohms
• 10 ohms
• 5 ohms
• 1 ohm

What is the purpose of a designed resistor in a circuit?

• increase the voltage

• control the flow of current

• measure current

• increase power