Three resistor 4 ohm 3 ohm R are and an ammeter connected in series to a cell of PD 2 volt if if the reading of ammeter is 0.25 then calculate the value of R
Answers
The value of R = 1 ohm
Given:
Three resistor 4 ohm 3 ohm R are and an ammeter connected in series to a cell of PD 2 volt.
Reading of ammeter is 0.25.
To find:
The value of R.
Formula used:
Ohms law: V = I × R
Where I = current
R = Equavalint Resistance
Explanation:
Reading of ammeter is 0.25. That is I = current = 0.25 A
When resister connected in series
Equavalint resistance = Sum of all resistance
= 3 + 4 + R = 7+R
By using Ohms law: V = I × R
2 = 0.25 × (7+R)
8 = (7+R)
R = 8-7 = 1 ohm
The value of R = 1 ohm
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