Question 7
(a) A student learning about electric circuits connects up the circuit shown in figure.
(i) The student has already made
one mistake with his connections.
What is his mistake? [1]
(ii) Draw the circuit diagram of the
arrangement shown in figure.
Using standard symbols.
[2]
(iii) The student now connects a voltmeter to the circuit, so that readings can be taken to
find the resistance of the coil of wire. On your circuit diagram, draw the voltmeter,
connected to measure the potential difference across the coil. [1]
(b) Having obtained a correctly-working circuit, the readings on the two meters for one setting
of the variable resistor are as shown in figures.
(i) Record these two readings in your answer script with SI unit. [1]
(ii) The slider on the variable resistor is moved a small distance to the left, reducing its
resistance.
State what happens to the readings on the two meters. [2]
(iii) The slider is adjusted so that the total resistance in the circuit is double that which
gave the readings in figures.
Calculate the new values of the readings on the meters.
Answers
Answered by
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Answer:
attach photo first
Explanation:
Answered by
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Answer:
where is the figure.........?????
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