1. Start writting the report by identifyidentify the manipulated and responding variable.2. InferenceInference : Cause and effect (of the

manipulated and responding variable)3. HypothesisHypothesis : ( manipulated variable )

Increase / Decrease, then ( responding variable ) increase / decrease

4. AimAim : To investigate the relationship between ( manipulated variable) and (responding variable).

5. ApparatusApparatus : Don’t Forget meter rule, stop watch etc6. ProcedureProcedure : Must mention manipulated quantity,must mention method of measuring responding variable.

8. TabulateTabulate data and analyse data : must include UNITSUNITS.

7. DataData must have at least 5 set.

Diagram 4.1 shows Jason taking a shower on a very cold morning. After the water heater is switched on for a while, he still feels cold.Diagram 4.2 shows that Jason no longer feels cold after the temperature control knobon the heater is turned.

Diagram 4.1 Diagram 4.2

MANIPULATED VARIABLES: THE ELECTRIC CURRENTTHE ELECTRIC CURRENTRESPONDING VARIABLES: THE INCREASE IN TEMPERATURETHE INCREASE IN TEMPERATURECONSTANT VARIABLES: THE VOLUME OF THE WATER /THE VOLUME OF THE WATER /TIME OF HEATING TIME OF HEATING / / LENGTH OF LENGTH OF WIRE / WIRE / DIAMETER OF WIREDIAMETER OF WIRE

(1 M)(1 M)

(2 M)(2 M)

THE TEMPERATURE OF THE WATER DEPENDSDEPENDS ON THE ELECTRIC CURRENT

THE ELECTRIC CURRENT AFFECT AFFECT THE TEMPERATURE OF THE WATER

OROR

(3 M)(3 M)

THE HIGHER THE ELECTRIC ELECTRIC CURRENTCURRENT, THE HIGHER THE TEMPERATURETEMPERATURE OF THE WATER

(4 M)(4 M)

TO INVESTIGATE THE RELATIONSHIP BETWEEN THE ELECTRIC CURRENT THE ELECTRIC CURRENT AND

THE TEMPERATURE OF THE WATER THE TEMPERATURE OF THE WATER

(5 M)(5 M)

BEAKER, AMMETER ,

THERMOMETER, THERMOMETER, IMMERSION HEATER ,

POWER POWER PACK , PACK , CONNECTING WIRE,CONNECTING WIRE, RHEOSTATRHEOSTAT

,,WATER AND WATER AND STOPWATCHSTOPWATCH

(6 M)(6 M)

BEAKER BEAKER

RHEOSTATRHEOSTAT

THERMOMETERTHERMOMETER

IMMERSION IMMERSION HEATERHEATER

WATERWATER

SWITCHSWITCH

AMMETERAMMETER

(7 M)(7 M)

CONTROL AND MEASURE THE(MV)

RECORD THE INITIAL TEMPERATURE OF THE RECORD THE INITIAL TEMPERATURE OF THE WATER,WATER,θθ00.

11

SWITCH IS ON AND ADJUST THE RHEOSTAT SWITCH IS ON AND ADJUST THE RHEOSTAT UNTIL THE AMMETER READING , UNTIL THE AMMETER READING , I =I = 0.2 A.0.2 A.

(8 M)(8 M)

HOW TO MEASURE THE (RV)RECORD THE FINAL TEMPERATURE, RECORD THE FINAL TEMPERATURE, θθFF AFTER AFTER 5 MINUTES BY USING THE STOP WATCH.5 MINUTES BY USING THE STOP WATCH.

22

REPEAT33

REPEAT THE EXPERIMENT WITH DIFFERENT REPEAT THE EXPERIMENT WITH DIFFERENT ELECTRIC CURRENT, ELECTRIC CURRENT, 0.3 A, 0.4 A,0.5 A AND 0.3 A, 0.4 A,0.5 A AND 0.6 A 0.6 A ..

(9 M)(9 M)

(10 M)(10 M)

I/AI/A INITIAL INITIAL TEMPERATURETEMPERATURE

((ΘΘ0 0 / / 00C)C)

FINAL FINAL TEMPERATURETEMPERATURE

((ΘΘff / / 00C)C)

INCREASE IN INCREASE IN TEMPERATURETEMPERATURE

((ΘΘ / / 00C)C)

INCREASE IN INCREASE IN TEMPERATURETEMPERATURE

0.10.1

0.20.2

0.30.3

0.40.4

0.50.5

0.20.2

0.30.3

0.40.4

0.50.5

0.60.6

(11 M)(11 M)

GRAPHGRAPH

I / AI / A

ΘΘ ΘΘ / / 00CC