PAPER 3 SECTION B QUESTION NO.4

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PAPER 3 SECTION BQUESTION NO.4
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THINGS TO REMEMBER

• 1. Start writting the report by identify the
• manipulated and responding variable.

• 2. Inference Cause and effect (of the
  manipulated and responding variable)

• 3. Hypothesis ( manipulated variable )
  Increase / Decrease, then ( responding variable )
  increase / decrease

• 4. Aim To investigate the relationship between
  ( manipulated variable) and (responding
  variable).

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THINGS TO REMEMBER

• 5. Apparatus Dont Forget meter rule,
  
• stop watch etc

• 6. Procedure Must mention manipulated
• quantity,must mention method of
• measuring responding variable.

• 7. Data must have at least 5 set.

• 8. Tabulate data and analyse data must
• include UNITS.

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Q.4 SECTION B 12 MARKS
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 knob on the heater is turned.
Diagram 4.1
Diagram 4.2
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(c) (ii) VARIABLES

• MANIPULATED VARIABLES

THE ELECTRIC CURRENT
(1 M)
RESPONDING VARIABLES
THE INCREASE IN TEMPERATURE
CONSTANT VARIABLES
THE VOLUME OF THE WATER / TIME OF HEATING /
LENGTH OF WIRE / DIAMETER OF WIRE
(2 M)
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(a) INFERENCE
THE ELECTRIC CURRENT AFFECT THE TEMPERATURE OF
THE WATER
OR

• THE TEMPERATURE OF THE WATER DEPENDS ON THE
  ELECTRIC CURRENT

(3 M)
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(b) HYPOTHESIS

• THE HIGHER THE ELECTRIC CURRENT, THE HIGHER THE
  TEMPERATURE OF THE WATER

(4 M)
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(C) (i) THE AIM

• TO INVESTIGATE THE RELATIONSHIP
• BETWEEN THE ELECTRIC CURRENT AND THE TEMPERATURE
  OF THE WATER

(5 M)
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(C) (iii) LIST OF APPARATUS AND
MATERIALS

• BEAKER,

AMMETER ,
IMMERSION HEATER ,
THERMOMETER,
POWER PACK ,
CONNECTING WIRE,
RHEOSTAT,
WATER AND STOPWATCH
(6 M)
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(C) (iv) ARRANGEMENT OF APPARATUS
SWITCH
RHEOSTAT
AMMETER
THERMOMETER

• BEAKER

WATER
IMMERSION HEATER
(7 M)
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(C) (v) PROCEDURE

• CONTROL AND MEASURE THE(MV)

1
RECORD THE INITIAL TEMPERATURE OF THE WATER,?0.
SWITCH IS ON AND ADJUST THE RHEOSTAT UNTIL THE
AMMETER READING , I 0.2 A.
(8 M)
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(C) (v) PROCEDURE

• HOW TO MEASURE THE (RV)

2
RECORD THE FINAL TEMPERATURE, ?F after 5 minutes
by using the stop watch.
(9 M)
REPEAT
3
REPEAT THE EXPERIMENT WITH DIFFERENT ELECTRIC
CURRENT, 0.3 A, 0.4 A,0.5 A AND 0.6 A .
(10 M)
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(C) (vi) TABULATE THE DATA






INITIAL TEMPERATURE (T0 / 0C)
FINAL TEMPERATURE (Tf / 0C)
INCREASE IN TEMPERATURE (T / 0C)
INCREASE IN TEMPERATURE

• I/A

0.1
0.2
0.2
0.3
0.3
0.4
0.4
0.5
0.5
0.6
(11 M)
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(C) (vii) ANALYSE THE DATA

• GRAPH

T
T / 0C
I / A
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RENUNG RENUNGKAN
DAN
SELAMAT BERAMAL