• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# An investigation into the efficiency of an immersion heater 2

Extracts from this document...

Introduction

Page:

Mohamed Hassan                student no: 20042512

## Introduction:

An emersion heater is primarily used to heat water. It does this by using electrical power and converting it into heat energy.

The amount of energy supplied to the emersion heater will be worked out using the formula: Voltage  Current Time.

The heat gained by the water was calculated by using the formula: Mass of water  Specific heat   Temperature change.

This will then be used to calculate the efficiency of the heater. Efficiency is how good the item being tested is

Middle

temperature of water after 2 minutes

To get a fair and average result I will change the type of wire I am using as well as the S.W.G of the wires but not the length of the wire so as to get a variety of results ands therefore see what wire is more efficient to use in the immersion heater.

## Results:

Below are the tables of the results I got once I had carried out the experiment.

 Constantan 28 S.W.G Length Voltage (v) Amps (c) Time in water Electrical energy Initial temp (oC) Final temp (oC) Temp change (oC) 40cm 9.30 4.30 2 minutes 4798.8 23 35 12
 Nickel chrome 28 S.W.G Length Voltage (v) Amps (c) Time in water Electrical energy Initial temp (oC) Final temp (oC) Temp change (oC) 40cm 10.27 2.05 2 minutes 2525.42 23 30 7

Conclusion

Things that I would change about this experiment if I  was to do it again would be that I would try more types of wires and a different variety of S.W.G s as there weren’t many different types of S.W.G s available at the science lab.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

## Here's what a teacher thought of this essay

3 star(s)

This report has an appropriate structure and the language used is good.
1. The plan is missing several sections including a variables and safety section.
2. The conclusion is very brief and does not use the data to back up the claim.
3. The report is missing an evaluation section.
***

Marked by teacher Luke Smithen 05/09/2013

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related GCSE Electricity and Magnetism essays

1. ## Resistance of a Wire

4 star(s)

Dial Voltage (volts) Actual Voltage (volts) Length of Wire (cm) Current (amps) Resistance (ohms) 4 2.40 10 2.30 1.04 4 2.72 20 1.66 1.64 4 3.26 30 0.95 3.43 4 3.10 40 0.80 3.88 4 3.10 50 0.53 5.85 4 3.19 60 0.60 5.32 (2)

2. ## resistance of a wire

3 star(s)

I can also change the length of the wire. The other alternative that I had was the thickness of the wire. This option was too hard as it was difficult to measure the thickness of the wire. Plan In this investigation I plan to investigate how the length of an 18SWG constantan wire affects the resistivity of the circuit.

1. ## To investigate which fuel gives out the most energy when burnt. We are burning ...

= 4620 Energy/mole = energy/moles = 4620�0.03625 = 127.44KJ/MOL _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 1.

2. ## The Bouncing Ball Experiment

gravitational force of the earth will try to pull it back down. This gives it a certain energy, which is called gravitational potential energy. The equation for gravitational potential energy is: Gravitational Potential Energy = mass (kg) x Gravitational Field Strength x Height (m)

1. ## Resistance of a Wire Investigation

Planning My experiment shall be set up as follows: I shall use the following apparatus: * power supply * ammeter * voltmeter * nichrome wire * rheostat * connecting wires The power supply will be permanently set to 2volts, but it is important to keep the amperage below 1A so that the wire does not overheat.

2. ## Resistivity in a wire coursework

Also, a longer wire has more resistance than a short wire. Furthermore, a thick wire has less resistance than a thin wire. Additionally, a hot wire has more resistance than a cold wire. If resistance occurs as the result of collisions between free electrons and ions in the wire, then

1. ## Design an experiment to predict and test the output from a simple AC generator.

Conventional current flows in the opposite direction to electron flow so the current (in relation to the way the electrons in the wire move as the wire is moved) is to the left. This means using Flemings left hand rule the force the electrons feel is downward.

2. ## Investigate how mass affects the diameter of an impact crater.

a crater and also I believe it will be interesting to observe how varying masses affect the diameter of a crater. Also as this is set as an independent variable, I will have independent control over the values I set it to prior to experimentation.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to