VERIFICATION OF STEFAN'S LAW

Voltmeter (V)

Ammeter (mA)

VOLTAGE

015

SET

Table 1:Readings for determination of the filament resistance (Rg)

S No.	Current Increasing			Current Decreasing			Mean R_g/3.9
S No.	Voltage V (volts)	Current I (mA)	R_g=V/I (ohms)	Voltage V (volts)	Current I (mA)	R_g=V/I (ohms)	Mean R_g/3.9
1
2
3
4
5
6
7
8
9
10
							Mean R₀=

Table 2: Determination of Power P for different temperature T:

To copy value of V and I from Table1 to Table2 and to calculate logP ang logT.
Click

S No.	Voltage V (volts)	Current I (mA)	R_t=V/I (ohms)	R_t/R₀	T (Temperature corresponding to R_t/R₀)	LogT	Power P=VI (volts)	LogP
1
2
3
4
5
6
7
8
9
10

Verify the Slope