HOOKS LAW Essay

Submitted By Mert-Erenel
Words: 537
Pages: 3

OHM’S LAW

INTRODUCTION
Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

In other words the more voltage you put in to a circuit the more the current will increase.

The aim of the experiment is to study Ohm’s law for DC circuits. To identify what happens to the current if a certain amount of voltage is given.

VARIABLES
The independent variable is the amount of voltage applied to the bulb. (Measured by sensor)
The dependent variable is the current of the circuit which depends on the amount of given voltage.
The controlled variables include, temperature, length and width of wire.

APPARATUS
Resistor
Variable DC voltage supply
Wires
Ammeter
Voltmeter

DIAGRAM OF EXPERIMENT

METHOD
Connect the circuit.
Start giving 1 Volts from the DC supply, then apply an addition of 0.5 Volts until 5.5 Volts, in the mean time record the data from the ammeter as you apply the voltage.
Repeat this action 3 times and remember to reset the sensor every time an experiment is finished.

DATA

DATA
CURRENT (I) + - 0.01
VOLT(V)
1st Trial (I)
2nd Trial(I)
3rd Trial (I)
AVERAGE(I)
1
0.11
0.11
0.10
0.11
1.5
0.13
0.13
0.13
0.13
2
0.16
0.16
0.16
0.16
2.5
0.18
0.18
0.18
0.18
3
0.20
0.20
0.20
0.20
3.5
0.22
0.22
0.22
0.22
4

4.5

0.24

0.25
0.23

0.24
0.23

0.25
0.23

0.25
5

0.27
0.26
0.27
0.27
5.5
0.28
0.28
0.28
0.28

The average is found by this formula: (1st TRIAL+2ND TRIAL+3RD TRIAL)/3=AVERAGE
EX:0.22+0.22+0.22=0.66/3=0.22
DATA FOR GRAPHING
Voltage(V)
AVERAGE OF CURRENT(I)
1
0.11
1.5
0.13
2
0.16
2.5
0.18
3
0.20
3.5
0.22
4
0.23
4.5
0.25
5
0.27
5.5
0.28

The first picture is linear fit, the second is manuel fit, showing minimum and maximum.

CONCLUSION AND EVALUATION

As shown by my graph the more voltage applied the more the current of the circuit increases; thus my hypothesis on the current…