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Please describe me about wheatstone bridge, its applications and conditions where it can and can't be used.
I will very very thankful to you
OK WHEATSTONE BRIDGE IS NOTHING BUT JUST A CIRCUIT WHICH FOLLOWS KIRCHOFFS LOOP RULE,
I WILL EXPLAIN U ON BASIC OF NCERT DIAGRAM.
JUST BEFORE I EXPLAIN U TAKE THIS BASIC CONVENTION ALSO
JUNCTION RULE:SUM OF CURRENT ENTERING A JUNCTION=SUM OF CURRENT LEAVING.
NOW SEE NCERT DIAGRAM:
I1=I3,I2=I4(NO CURRENT GOES THROUGHT GALV. ARM)
IN CLOSED LOOP ABDA:
V2-V1=0(LOOP RULE)(AT JUNCTION AS CURRENT IS NEGATIVE POTENTIAL IS NEGATIVE)
HEANCE I2R2 - I1R1=0 =>I2R2=I1R1........(1)
SIMILARLY IN CLOSED LOOP BCDB:
I2R4=I1R3......(2)
DIVIDE THEM U GET (R1/R2 = R3/R4)
THIS IS WHEATSTONE BRIDGE(MAIL AGAIN IF U NEEDED ITS AIM AND CONS.) APPLICATION:METRE BRIDGE APPLICATIONS
SORRY FOR LAST LINES:
APPLICATION OF WHEATSTONE BRIDGE LIES IN METER BRIDGE AN POTENTIOMETER
U WILL DO THESE IN UR PRACTICALS ALSO:
METER BRIDGE:
1. TO FIND RESISTIVITY OF GIVEN MATERIAL.
2. TO FIND VALUE OF UNKNOWN RESISTANSE USING METER BRIDGE.
POTENTIOMETER:
1.TO FIND OUT EMF OF AN UNKNOWN BATTERY USING 1 KNOWN BATTERY
HOPE U ARE CLEAR NOW
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