please give me answer
observation table to determine the equivalent resistance of two resistors when connected in series.
Answers
ANSWER :
Observation Table
Resistor used
No.of observations
Voltmeter reading in Volts (V)
Ammeter reading in Ampere (I)
R=V/I (in Ohm)
Mean value of resistance (Ohm)
R1 (first resistor)
a
0.01
0.01
1
R1 = 1 ohm
b
0.02
0.02
1
c
0.04
0.04
1
R2 (second resistor)
a
0.02
0.01
2
R2 = 2 ohm
b
0.06
0.03
2
c
0.08
0.04
2
1/Rp=(1/R1)+(1/R2)
Parallel combination
a
0.026
0.04
0.67
Rp=0.67 ohm
1/Rp=1.5 ohm
Result
The calculated value of 1Rp
1Rp=(1R1)+(1R2)=1.5Ω
The experimental value of 1Rp
1Rp=1.5Ω
The equivalent resistance Rp is less than the individual resistance.
Precautions
The connecting wires that are used should be thick copper wire and using sandpaper the insulation at the end of the wires should be removed.
To avoid the introduction of external resistance, the connections should be tight.
To make connections, the circuit diagram should be referred.
To make the current entry from the positive terminal and exit from the negative terminal, the ammeter should be connected in series.
Resistor and voltmeter should be connected in parallel.
Least count of ammeter and voltmeter should be calculated properly.
When there is no current flow, the ammeter and voltmeter should be at zero.
To avoid heating and change in the resistance value of the resistor, the current should flow while taking the readings
HAPPY FRIENDSHIP DAY SURAJ