A multirange voltmeter can be constructed by using a galvanometer circuit as shown in figure. We want to construct a voltmeter that can measure 2 V, 20 V and 200 V using a galvanometer of resistance 10 ? and that produces maximum deflection for current of 1 mA. Find R1, R2and R3 that have to be used,
This is a Short Answer Type Questions as classified in NCERT Exemplar
Explanation- applying expression in different situation
For iG (G+R1) = 2 , for 2V range
iG (G+R1+R2) = 20 , for 20V range
iG (G+R1+R2+R3) = 2 , for 200V range
on solving we get R1= 1990ohm, R2= 18kohm, R3= 180k ohm
<p>This is a Short Answer Type Questions as classified in NCERT Exemplar</p><p><strong>Explanation- </strong>applying expression in different situation</p><p>For i<sub>G</sub> (G+R<sub>1</sub>) = 2 , for 2V range</p><p>i<sub>G</sub> (G+R<sub>1</sub>+R<sub>2</sub>) = 20 , for 20V range</p><p>i<sub>G</sub> (G+R<sub>1</sub>+R<sub>2</sub>+R<sub>3</sub>) = 2 , for 200V range</p><p>on solving we get R<sub>1</sub>= 1990ohm, R<sub>2</sub>= 18kohm, R<sub>3</sub>= 180k ohm</p>
There are two types of electricity - static and current. The current electricity is divided into Alternating Current (AC) and Direct Current (DC). Based on the production methods, electricity is divided into - heat, chemical, pressure, light and magnetism.
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