Grade 12Electric Current
Please send solution to this question from current electricity
1 Answer
Khimraj
Approved Tutor Answer8 Years agoLet resistance of voltmeter is R and current through voltmeter is I.
Then initial condition
V = I*R – ( 1)
And final condition
100*V = I*(R +1980) – (2).
Dividing equation (2) by equation (1).
100 = 1 + 1980/R
SO 99 = 1980/R.
Then R = 1980/99 = 20 ohm.
Hope it clears. If you like answer then please approve it.
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