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17 Of all the components in the circuit shown below, the current flowing 2
through the voltmeter is the least. Explain why.
18 3
(i) Identify the device which is an ammeter. Justify your answer.
(ii) What is the function of rheostat? Plot a straight-line graph to verify
Ohm's law.
(iii) Draw a circuit diagram with appropriate symbols for the circuit shown in
the diagram given above.
19 Suresh bought a packet of 100 LEDs to make his own lights for decoration in 5
his house. The packet on the LEDs has the following information printed on
a label: LED 2835, 0.2 W, 30 Lumens, 3 V.
To understand how he should connect the LEDs, he referred to the following
circuit diagram on a website.
