In a slide wire bridge, the balance is obtained at a point 25cm from one end of wire 1m long. The resistance to be tested is connected to that end and a standard resistance of 3.6(Omega) is connected to the other end of the wire. Determine the value of the unknown resistance
-
A.
3.2(Omega) -
B.
1.4(Omega) -
C.
3.21(Omega) -
D.
1.2(Omega)
Correct Answer: Option D
Explanation
(frac{R}{3.6} = frac{75}{25} = frac{1}{3})
3R = 3.6
R = 1.2(Omega)
There is an explanation video available below.