SSC JE Electrical Engineering 22 Jan 2018 Morning Paper

Question : 145 of 200

Marks: +1, -0

Determine the required value of series resistance (in Ohms) to convert a galvanometer into a voltmeter of reading 0.4 volt range when the resistance of the galvanometer is 40 ohms and the value of current for full-scale deflection is 4 mA.

Validate

Solution:

Given data
V = 0.4V
I = 4 mA.

\R_\galvanometer

= 40 Ω
Now V = I × R
0.4 = 4 × 10

^{–3}

(40 +

R_V

)

⇒R_V=60Ω

Go to Question:

Prev Question

Next Question