#1. When using a fixed resistor, how does current vary with voltage?

Current and voltage change by different percentages as the resistor gets hot - they are not directly proportional

Current and voltage change by the same percentage - they are directly proportional

#2. When resistance increases but voltage stays the same what happens to the current?

Current stays the same

Current decreases

Current increases

#3. How does the resistance of a light dependant resistor (LDR) change with light intensity?

Resistance increases as light intensity increases (more resistance in the light)

Low resistance in the dark and low resistance in the light. Medium resistance in between.

Resistance decreases as light intensity increases (more resistance in the dark)

#4. If voltage or current changes for filament lamps, diodes, thermistors and LDR's, which components do we need in a circuit to explore the effects on resistance? ? 3

Select all that apply:

Variable resistor

Potometer

Voltmeter

Motor

Buzzer

Ammeter

#5. Which of the following statements is correct:

Diodes have a very high resistance in one direction and therefore only allow current to flow one way

Diodes get very hot when operating for long periods and this causes an increase in resistance, but only in one direction

When a diode, current can flow in both directions at all times

#6. When using a filament lamp, how does current vary with voltage?

Current and voltage change by the same percentage - they are directly proportional

Current and voltage change by different percentages as the lamp gets hot - they are not directly proportional

#7. Calculate the current when resistance = 5 and voltage = 10 Include the units for current in your answer.

enter answer here...

#8. When testing and measuring using series circuits, which component is used to adjust the current?

Fixed resistor

Variable resistor

Voltmeter

Ammeter

#9. When multiple resistors are connected in series, how does the total resistance of the circuit change?

Stays the same because the resistance is fixed by the component with the highest resistance

Increases because the pathway becomes harder for the current to flow through

Decreases because there are more paths for the current to take

#10. Which of the following are the correct units for resistance?

Coulombs (C)

Volts (V)

Ohms (Ω)

Amps (A)

#11. When multiple resistors are connected in parallel, how does the total resistance of the circuit change?

Decreases because there are more paths for the current to take

Increases because the pathway becomes harder for the current to flow through

Stays the same because the resistance is fixed by the component with the highest resistance

#12. Which is the correct formula for the relationship between potential difference (voltage), resistance and current?

R = VI

I = VR

V = IR

#13. Which component can be used to change the resistance of a circuit?

Voltmeter

Variable resistor

Ammeter

Switch

#14. How does the resistance of a thermistor change as the temperature changes?

Resistance increases as temperature increases (high resistance at high temperatures)

Thermistors are sensitive to light, not heat and so there is no change

Resistance decreases as temperature increases (low resistance at high temperatures)

#15. Calculate the voltage when resistance = 7.5 and current = 15.4. Include the units for voltage in your answer. ? If you do not know the correct equation, it is listed below the quiz

enter answer here...

Electrical Resistance Quiz

Good Luck!

Results

#1. When using a fixed resistor, how does current vary with voltage?

#2. When resistance increases but voltage stays the same what happens to the current?

#3. How does the resistance of a light dependant resistor (LDR) change with light intensity?

#4. If voltage or current changes for filament lamps, diodes, thermistors and LDR's, which components do we need in a circuit to explore the effects on resistance? ? 3

#5. Which of the following statements is correct:

#6. When using a filament lamp, how does current vary with voltage?

#7. Calculate the current when resistance = 5 and voltage = 10 Include the units for current in your answer.

#8. When testing and measuring using series circuits, which component is used to adjust the current?

#9. When multiple resistors are connected in series, how does the total resistance of the circuit change?

#10. Which of the following are the correct units for resistance?

#11. When multiple resistors are connected in parallel, how does the total resistance of the circuit change?

#12. Which is the correct formula for the relationship between potential difference (voltage), resistance and current?

#13. Which component can be used to change the resistance of a circuit?

#14. How does the resistance of a thermistor change as the temperature changes?

#15. Calculate the voltage when resistance = 7.5 and current = 15.4. Include the units for voltage in your answer. ? If you do not know the correct equation, it is listed below the quiz

Electrical Resistance - Equations

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