A student sets up an experiment to measure the potential difference (voltage) across a filament lamp - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Question 3
A student sets up an experiment to measure the potential difference (voltage) across a filament lamp.
She changes the current through the lamp.
The diagram shows t... show full transcript
Worked Solution & Example Answer:A student sets up an experiment to measure the potential difference (voltage) across a filament lamp - Edexcel - GCSE Physics - Question 3 - 2013 - Paper 1
Step 1
The component X in the circuit diagram is a
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
In the circuit diagram, component X is a variable resistor (D). A variable resistor is commonly used to adjust the current flowing through the circuit, thereby allowing for measurements of potential difference across the filament lamp.
Step 2
The meter that measures potential difference is
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The meter that measures potential difference should be in parallel with the lamp (B). Connecting the voltmeter in parallel allows it to accurately measure the potential difference across the lamp without affecting the current flowing through it.
