Certain gases in the atmosphere – water vapor, carbon dioxide, methane and nitrous oxIde – help maintain the Earth’s temperature
1 answer:
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Answer:
Explanation:
Resistance, R1 = 6 kilo ohm
Resistance, R2 = 5 kilo ohm
Resistance of voltmeter, R = 10 kilo ohm
Voltage , V = 50 V
(a) When the voltmeter is applied
R and R2 in parallel. Rp = 10 x 5/ 15 = 3.33 kilo ohm
Now, Rp and r1 in series,
Req = 6 + 3.33 = 9.33 kilo ohm
Let i is the total current
i = V/ Req
i = 50 / (9.33 x 1000) = 5.36 mA
Let potential difference across the 5 kilo ohm is V'.
V' = i x R2 = 5.36 x 10^-3 x 5 x 1000 = 26.8 V
(b) When the meter is not applied
R1 and R2 in series
Req = R1 + R2
Req = 6 + 5 = 11 kilo ohm
i = V / Req = 50 / 11 = 4.55 mA
Let the potential difference across the 5 kilo ohm is V''.
V'' = i x R2 = 4.55 x 10^-3 x 5 x 1000 = 22.73 V
(c) Percentage error
= 18 %