A students connects an ammeter `A `and a voltmeter `V` to measure a resistancer as shown in figure. If the voltmeter reads `20 V` and the ammeter reads `4A`, then `R` is A. equal to `5Omega`B. greater than `5Omega`C. less than `5Omega`D. greater or less than `5Omega` depending upon the direction of current

A students connects an ammeter `A `and a voltmeter `V` to measure a re

1.	A students connects an ammeter `A `and a voltmeter `V` to measure a resistancer as shown in figure. If the voltmeter reads `20 V` and the ammeter reads `4A`, then `R` is A. equal to `5Omega`B. greater than `5Omega`C. less than `5Omega`D. greater or less than `5Omega` depending upon the direction of current
Answer» Correct Answer - C `4(R+R_A)=20V` `:. R=5-R_A` where `R_A`= resistane of ammeter

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