Question

OBSERVATION
Voltmeter
А
V
Ammeter
Least count
Zero error
V
A
Resistance
R = (V/1)
Voltmeter reading in volt
Ammeter reading in ampere
S.No.
in Ohm
Corrected (V)
Observed
Corrected (1)
Observed
1.
2.
3.
Mean vlaue of resistance, R =
W​

Answer 1

Least count of ammeter =0.5 mA

Least count of voltmeter= 0.5mV

Zero error of ammeter = 0.01 mA

Zero error of Voltmeter = 0.01 mV

Slope =Resistance = V/I

Mean value of resistance = 4.99 Ohm

• Both of these devices are used in electric circuits, but the main distinction between an ammeter and a voltmeter is that the voltmeter is useful for measuring the voltage or emf across two points in an electric circuit, whilst the ammeter is useful for measuring the flow of current.
• The term "least count" refers to an instrument's lowest quantifiable value.
• Least count of voltmeter:

In the case of Voltmeter, we see 5 divisions = 2 volts.

therefore LC =2/5 = 0.4 V

• Least count of the voltmeter

• For the ammeter, we see 5 divisions, which equals 10A.
• Therefore, the least count (LC) = 10/5 = 2A.

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