Components
Formulae
Equivalent Resistance:
`frac (1)(R_(eq))=frac(1)(r1+r3) + frac(1)(r2+r4)``R_(eq) = frac((r1+r3)(r2+r4))(r1+r2+r3+r4)`
Current Through the battery is:
`I_(Bt) = frac((V)*(r1+r2+r3+r4))((r1+r3)(r2+r4))`If Bridge is Balanced:
Voltage difference between galvanometer terminals: 0
Current through the galvanometer: 0
If Bridge is Unbalanced:
Using Thevenin's Equivalent across galvanometer terminals:
Voltage difference between galvanometer terminals: `V_("Th") = frac(V*(r3*r2 - r1*r4))(r1+r2+r3+r4)`
`R_("Th") = frac(r1*r3)(r1+r3) + frac(r2*r4)(r2+r4)`
Current through the galvanometer: `I_(G) = frac(V_("Th"))(R_(G)+(R_(Th)))`
WorkSpace
- STEP 1: Pick up four resistances, a battery and a galvanometer from the Components.
- STEP 2: Connect the resistances and the battery as shown in the figure to form a wheatstone
bridge.
- STEP 3: Click on check circuit button to check the connections.
- STEP 4: Now Enter the fixed ratio of R1/R2, value of voltage and choose appropriate value of R3
through
slider and click on the "Submit"button.
- STEP 5: Repeat the experiment untill the bridge gets balanced.
close
Equivalent Resistance:
`frac (1)(R_(eq))=frac(1)(r1+r3) + frac(1)(r2+r4)``R_(eq) = frac((r1+r3)(r2+r4))(r1+r2+r3+r4)`
Current Through the battery is:
`I_(Bt) = frac((V)*(r1+r2+r3+r4))((r1+r3)(r2+r4))`If Bridge is Balanced:
Voltage difference between galvanometer terminals: 0
Current through the galvanometer: 0
If Bridge is Unbalanced:
Using Thevenin's Equivalent across galvanometer terminals:
Voltage difference between galvanometer terminals: `V_("Th") = frac(V*(r3*r2 - r1*r4))(r1+r2+r3+r4)`
`R_("Th") = frac(r1*r3)(r1+r3) + frac(r2*r4)(r2+r4)`
Current through the galvanometer: `I_(G) = frac(V_("Th"))(R_(G)+(R_(Th)))`
Calculations
Give Input:
Observation Table
| R1(Ω) | R2(Ω) | R3(Ω) | R4(Ω) | Voltage(V) | `I_(G)`(A) |
|---|