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Marking scheme for Chapter 1 Form 4
Paper 2
Question 1 Mark Answer Note
(a) 1 Voltage / potential difference(b) 1 0.5V Must write with the
correct unit (V).
(c) 1 Instrument Y
(d) 1 Parallel in circuit
Question 2
(a) 1 Quantity that can be measured
(b) 1 Zero error
(c) 1 Microampere Reject: Ampere
(d) 1 Subtracting the reading with the zero error
Question 3
(a) 1 Vernier callipers Correct spelling
(b) 1 To measure internal diameter
(c) 1 0.01cm Correct unit
(d) 1 2.55cm Correct unit
Question 4
(a) 1 0.2s Correct unit
(b) 1 -0.4s Correct unit
Reject: 0.4s / 0.4
(c) 1 50.0s(-0.4s)
1 50.4s Correct unit
Question 5
(a) 1 Length
(b) 1 0.9cm Correct unit
(c) 1 Vernier callipers / micrometer screw gauge
(d) 1 Parallax error
Question 6
(a) 1 Voltage
(b) 1 0.8V
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(c) 1 Subtract the reading with zero error
(d) 1 0.1V
Question 7
(a) 1 Tail
(b) 1 To measure the depth
(c) 1 Negative zero error Reject: Zero error
(d) 1 -0.07cm Reject: 0.07cm
Question 8
(a) 1 Temperature
(b) 1 2oC Correct unit
(c) 1 24oC Correct unit
(d) 1 Mercury
Question 9
(a) 1 H
(b)(i) 1 Voltmeter B
(b)(ii) 1 Has smaller division on its scale Reject: Can detectsmaller changes(didnot shown in diagramprovided)
Must havecomparative wordslikeer to comparethe two objects
(c) 1 Voltmeter measures potential difference(voltage) while ammeter measures current
Question 10
(a) 1 Mass
(b)(i) 1 Diagram 1.3
(b)(ii) 1 Has the smaller division on its scale
(c) 1 Repeat the readings and get the averagevalue // The position of the eye must beperpendicular to the scale of the reading
while taking measurement
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Question 11
(a) 1 Vernier callipers Reject: Micrometerscrew gauge
(b) 1 To get more accurate reading
(c) 1 Micrometer screw gauge Reject: Metre rule //vernier callipers
(d) 1 0.0063cm Correct unit
Question 12
(a) 1 Zero error / systematic error
(b)(i) 1 44.0s Must be one decimalplace and with thecorrect unit
Reject: 44s
(b)(ii) 1 44/20 (form 5 chapter 1)
1 2.2s (form 5 chapter 1)
(c) 1 increases
Question 13
(a) 1 Scalar quantity
(b) 1 0.1A
(c) 1 0.3A
(d) 1 Take the measurement when the eye isperpendicular to the scale of the reading to
avoid parallax error
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