# Mercedes

Topics: Light-emitting diode, Transverse wave, Infrared Pages: 23 (2165 words) Published: February 4, 2013
Centre Number

For Examiner’s Use

Candidate Number

Surname
Other Names

Examiner’s Initials

Candidate Signature
Question

General Certificate of Secondary Education
Higher Tier
January 2012

Science A

PH1HP

H

Unit Physics P1

Physics
Unit Physics P1
Friday 20 January 2012

Mark

1
2
3
4
5
6
7
8

9.00 am to 10.00 am

TOTAL

For this paper you must have:
 a ruler
 the Physics Equations Sheet (enclosed).
You may use a calculator.

Time allowed
 1 hour
Instructions
 Use black ink or black ball-point pen.
 You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.
 Do all rough work in this book. Cross through any work you do not want to be marked.
Information
 The marks for questions are shown in brackets.
 The maximum mark for this paper is 60.
 You are expected to use a calculator where appropriate.
 You are reminded of the need for good English and clear presentation in your answers.
 Question 2(b) should be answered in continuous prose. In this question you will be marked on your ability to:
– use good English
– organise information clearly
– use specialist vocabulary where appropriate.
 In all calculations, show clearly how you work out your answer.

(JAn12PH1hp01)

G80428

6/6/6/6

PH1HP

2

Do not write
outside the
box

Answer all questions in the spaces provided.

1

The diagram shows two thermometers. The bulb of each thermometer is covered with a piece of wet cotton wool. One of the thermometers is placed in the draught from a fan.

Thermometer bulb
Wet cotton wool
Draught

Fan

The graph shows how the temperature of each thermometer changes with time.

25

20

A

Temperature
in °C
15
B
10
0.0

(02)

0.5

1.0

1.5
2.0
Time in minutes

2.5

3.0

G/J80428/Jan12/PH1HP

3
1 (a)

Do not write
outside the
box

Which of the graph lines, A or B, shows the temperature of the thermometer placed in the draught?
Write the correct answer in the box.
Explain, in terms of evaporation, the reason for your answer. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks)

1 (b)

A wet towel spread out and hung outside on a day without wind dries faster than an identical wet towel left rolled up in a plastic bag.
Explain why.
............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks)

____
5

Turn over for the next question

Turn over 

(03)

G/J80428/Jan12/PH1HP

4
2

Do not write
outside the
box

The diagram shows the National Grid...