a wire connected in the left gap of a meter bridge balance a 10 ohm in the right gap at a point which divides the bridge wire in the ratio of 3:2 .what is the resistance of the wire
Answers
Answered by
8
Option 4: 1 ohm. Correct
Resistance of the unknown wire shall be 3 ohm .
Explanation; L1/L 2 =3/2 or R/10=3/2 or R=15 ohm.
Wheatstone bridge: Meter bridge or Wheatstone bridge is an electrical contrivance that is used in physics laboratories for measurement of an unknown electrical resistance by means of balancing of resistance by adjusting the length of resistance.
Two legs are balanced on a bridge circuit, one of which introduced the unknown resistance to be measured.
The primary benefit of the circuit lies in its capability to produce extremely accurate measurements.
The operation is much similar to the original potentio meter.
Answered by
19
R/s=3/2, s=10 ohm
R=3/2×s=3/2 ×10=15ohm
As the length of the wire is 1 m
Length of the 1 ohm wire=1/15 =0.067m
Similar questions