Download S3homework 2 - Eyemouth High School

Eyemouth High School
Physics Department
Physics S3
Homework Number 2
Help sessions every morning 08.20am-08.50am and Thursday 1.25pm-1.55pm
Final Date for Handing in Exercise is 11th December 2015
Notes
 All diagrams must be labelled and drawn using a ruler
 The minimum size for diagrams is 8cm by 5cm
 All questions must be answered in the homework jotter
 Read the homework policy statement
 Numerical answers must be laid out correctly
Formula
Substitution
Calculation + Units
Read the appropriate pages in Physics Through Applications and the Studymate
1. Copy and complete this table of results from an experiment done to
investigate the resistance of a resistor.
Voltage
in volts
1.2
2.5
3.7
4.5
5.6
6.8
7.2
Current
in milliamps
140
290
420
530
660
790
840
Current
in amps
Resistance
in ohms
(a)
Draw the circuit that could have been used in the
experiment.
(b)
Use graph paper to draw a graph of Voltage against current
for the results shown.
(c) How does this graph show that the resistance is constant?
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Eyemouth High School
Physics Department
Physics S3
Homework Number 2
2. Draw a table showing the colours of the wires in a three pin plug.
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3. (a) What is the voltage of the mains supply in this country?
(b) What is the frequency of the mains supply in this country?
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4. Calculate the voltage across a bulb if the current is 60 mA and the
resistance is 200 ohms
2
5. Calculate the current through a resistor if the voltage is 150V and
the resistance is 300 kilohms.
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6. Two resistors of 5 ohms and 10 ohms are connected in parallel.
Calculate the total resistance.
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