A student investigates how the current in a lamp varies with the voltage (p.d.) across it. She
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A student investigates how the current in a lamp varies with the voltage (p.d.) across it. She uses the circuit shown below.
a. Three of the components are labelled, A, V, and B. Write down what each one is.
b. Describe how the student should early out the experiment.
From her results, the student plots this graph:
c. What is the current when the voltage across the lamp is 2.0 V?
d. What is the resistance of the lamp when the voltage across it is 2.0 V?
e. What is the resistance of the lamp when the voltage across it is 6.0 V?
f. What happens to the resistance of the lamp as the voltage across it is increased?
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a Component A is likely the power supply such as a battery component V is likely a voltmeter to meas...View the full answer
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