Question

Write two precautions that must be taken while determining the equivalent resistance of the two resistors connected in series

Answer 1

a. the connection should be tight and clean .

b. the wire should only be connected at the terminals not in between.

c. clean the ends of connecting wire with a sand paper .

d. take the voltmeter and ammeter in proper range .

e. the rheostat should be used of low resistance ( about 100).

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Answer 2

Answer:

PRECAUTIONS

1.The connections should be neat and clean.

2.The connections should be tight.

3.Wires of small length should be used to make connections.

4.Joint the +ve terminal of the devices with the +ve terminal of the battery.

5.Voltmeter should always be connected in parallel to the combination of resistors.

Note

For series combination, the mean resistance of resistors r, and r2 is equal to the sum total of all the individual resistances of resistorsr, and r2.