Question
Download Solution PDFA spring controlled moving iron voltmeter with full scale deflection of 150 V draws a current of 2 mA. What will be the meter reading if it draws a current of 1 mA?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 4) 37.5 V
Concept:
For moving iron meter
Reading ∝ I2
\(V_1 \over V_2\) = \(I_1^2 \over I_2^2\)
where
I1 is the current corresponding to the voltage V1
I2 is the current corresponding to the voltage V2
Calculation:
Given
V1 = 150 V
I1 = 2 mA
V2 = ?
I2 = 1 mA
\(150 \over V_2 \) = \(2^2 \over 1\)
\(150 \over 4\) = V2
V2 = 37.5 V
Last updated on Jun 24, 2025
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