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Index
»
Physics AQA A level
»
Electricity
»
Circuits
level: Circuits
Questions and Answers List
level questions: Circuits
Question
Answer
What is power a measure of?
How quickly something can transfer energy
How would you describe the relationship between differnt points in a series circuit when discussing current?
Same everywhere
How would you describe the relationship of voltage round a series circuit?
Total voltage is summed
How would you describe resistance a series circuit?
Sum of each resistor = total resistance
How would you describe resistance a series circuit?
Sum of each resistor = total resistance
How would you describe the total resistance in parallel?
1 over the sum of the resistors in parallel
How would you describe voltage in a parallel circuit?
Total voltage is the same at any point in the parallel circuit
Describe current in parallel
Total current is the sum of all branches of current
Which way does current flow out of a cell? Phat end or skinny end?
Phat
State Kirchoffs first law
Electric charge is conserved in all circuits Sum of currents flowing into that node is equal to the sum of currents flowing out of that node
What is Kirchoffs second law
sum of all voltages around a closed loop in any circuit must be equal to zero
What could you say about the relationship between energy going in and out of a circuit
Current going in = current going out
What could you say about the relationship between the energy takers and givers in a circuit
Energy givers = energy takers