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A current of 1.5 A flows through a copper voltmeter. The thickness of copper deposited on the electrode surface of area 50 cm2 in 20 min will be (Density of copper = 9000 kgm-3 and ECE of copper = 0.00033 g C-1)
  • a)
    2.6 x 10-5m
  • b)
    2.6 x 10-4 m
  • c)
    1.3 x 10-5 m
  • d)
    1.3 x 10-4 m
Correct answer is option 'C'. Can you explain this answer?
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Given data:
Current (I) = 1.5 A
Area (A) = 50 cm2 = 0.005 m2
Time (t) = 20 min = 1200 s
Density of copper (ρ) = 9000 kg/m3
Electrochemical equivalent of copper (ECE) = 0.00033 g C-1

Calculations:
1. Calculate the total charge passing through the voltmeter:
Q = I * t
Q = 1.5 A * 1200 s
Q = 1800 C
2. Calculate the mass of copper deposited:
m = Q * ECE
m = 1800 C * 0.00033 g/C
m = 0.594 g
3. Convert the mass of copper to volume:
ρ = m/V
V = m/ρ
V = 0.594 g / 9000 kg/m3
V = 6.6 x 10^-5 m3
4. Calculate the thickness of copper deposited on the electrode surface:
Volume = Area * Thickness
Thickness = Volume / Area
Thickness = 6.6 x 10^-5 m3 / 0.005 m2
Thickness = 1.32 x 10^-5 m

Final answer:
The thickness of copper deposited on the electrode surface in 20 min will be approximately 1.3 x 10^-5 m. So, the correct answer is option 'C'.
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A current of 1.5 A flows through a copper voltmeter. The thickness of copper deposited on the electrode surface of area 50 cm2 in 20 min will be (Density of copper = 9000 kgm-3 and ECE of copper = 0.00033 g C-1)a)2.6 x 10-5mb)2.6 x 10-4mc)1.3 x 10-5md)1.3 x 10-4mCorrect answer is option 'C'. Can you explain this answer?
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A current of 1.5 A flows through a copper voltmeter. The thickness of copper deposited on the electrode surface of area 50 cm2 in 20 min will be (Density of copper = 9000 kgm-3 and ECE of copper = 0.00033 g C-1)a)2.6 x 10-5mb)2.6 x 10-4mc)1.3 x 10-5md)1.3 x 10-4mCorrect answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A current of 1.5 A flows through a copper voltmeter. The thickness of copper deposited on the electrode surface of area 50 cm2 in 20 min will be (Density of copper = 9000 kgm-3 and ECE of copper = 0.00033 g C-1)a)2.6 x 10-5mb)2.6 x 10-4mc)1.3 x 10-5md)1.3 x 10-4mCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A current of 1.5 A flows through a copper voltmeter. The thickness of copper deposited on the electrode surface of area 50 cm2 in 20 min will be (Density of copper = 9000 kgm-3 and ECE of copper = 0.00033 g C-1)a)2.6 x 10-5mb)2.6 x 10-4mc)1.3 x 10-5md)1.3 x 10-4mCorrect answer is option 'C'. Can you explain this answer?.
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