Wheatstone bridge

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

Instructions

Wheatstone Bridge Experiment:

STEP 1:

STEP 2:

STEP 3:

STEP 4:

"Submit"

STEP 5:

Wheatstone Bridge Experiment

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)

Components

Formulae

Equivalent Resistance:

Current Through the battery is:

If Bridge is Balanced:

If Bridge is Unbalanced:

WorkSpace

Equivalent Resistance:

Current Through the battery is:

If Bridge is Balanced:

If Bridge is Unbalanced:

Calculations

Give Input:

Resistance (R3):

Observation Table