1.

A, B and C arc voltmeters of resistance R, 1.5R and 3R respectively as shown in the figure. When some potential difference is applied between X and Y, the voltmeter readings are V_(A) , V_(B) and V_(C) repsectively. Then :

Answer»

`V_(A) = V_(B) = V_(C) `
`V_(A) ne V_(B) = V_(C)`
`V_(A) = V_(B) ne V_(C)`
`V_(A) ne V_(B) ne V_(C)`

Solution :`V_(A) = V_(B) = V_(C)`
EQUIVALENT capacitance between B and C
` = (1.5R XX 3R)/(1.5R + 3R)`
`= (4.5 R)/(4.5) = R `

Potential in series connection, V `prop ` R
`therefore ` Voltage in A = Voltage in B and C
As B and C are in PARALLEL, so that `V_(B) = V_(C)`
`therefore V_(A) = V_(B)= V_(C)`


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