Investigating Resistance - PRACTICAL Flashcards
Electricity (19 cards)
What is the first step in investigating adding resistors in series?
Find at least four identical resistors
What is the formula to calculate resistance in the circuit?
R = V / I
What do you measure first after building the circuit with one resistor?
The current through the circuit using the ammeter
What is the next step after measuring the current with one resistor?
Add another resistor in series with the first
In a series circuit, what happens to the total resistance when you add resistors?
Total resistance increases
What happens to the total current in a series circuit when resistors are added?
Total current decreases
What should you do after adding all resistors in series?
Plot a graph of the number of resistors against the total resistance
What is the first step in investigating adding resistors in parallel?
Build the same initial circuit with the same equipment
How do you calculate the resistance of the circuit when adding resistors in parallel?
R = V + I
What happens to the total current in a parallel circuit when resistors are added?
Total current increases
What happens to the overall resistance when adding resistors in parallel?
Overall resistance decreases
What should you do after adding all resistors in parallel?
Plot a graph of the number of resistors against the total resistance
True or False: Adding resistors in series increases total resistance.
True
True or False: Adding resistors in parallel increases total resistance.
False
What should the results of your experiments match?
The resistance rules
What is the relationship between the number of resistors and overall resistance in series?
The more resistors you add, the larger the resistance
Fill in the blank: When resistors are added in parallel, the total _______ of the circuit decreases.
resistance
What is the expected outcome when plotting the number of resistors against total resistance in series?
An increase in total resistance
What is the expected outcome when plotting the number of resistors against total resistance in parallel?
A decrease in overall resistance
