E2/3: Resistance and Internal Resistance

What is the unit of measurement for resistance?

• Voltage

• Ampere

• Watts

• Ohms

How to you calculate the total resistance in a series circuit?

• R1 + R2+ R3

• R1 - R2 - R3

• 1/R1 + 1/R2 + 1/R3

• R1 = R2 = R3

How do you calculate total resistance in a parallel circuit?

• R1 + R2 + R3

• R1 - R2 - R3

• 1/R1 +1/R2 + 1/R3 = 1/RT

• R1 = R2 = R3

What is Resistance?

• the degree to which a circuit component opposes the passage of an electric current, causing energy dissipation
• How hard the energy is pushed
• The amount of charges that pass by a given point per second
• None of the above

What is the equivalent or total resistance (R_e) across this circuit?

• 3 kΩ

• 10 kΩ

• 13 kΩ

• 18 kΩ

What size resistor would produce a 3 Amp current flow with a 12 Volt battery

• 1 Ohm
• 3 Ohms
• 4 Ohms
• 12 Ohms

R =

• Resistance

• Internal Resistance

• Current

• Resistivity

r =

• Resistance

• Internal Resistance

• Current

• Resistivity

What is the resistance if the voltage is 10V and the current is 2A?

• 20 Ω

• 5 Ω

• 12 Ω

• 8 Ω

How do you measure potential difference in a circuit?

• Voltmeter

• Ammeter

• Thermistor

• Battery pack