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

Electromotive Force and Internal Resistance of a cell

Extracts from this document...

Introduction

IB Physics SL Lab Report

Electromotive Force and Internal Resistance of a cell

Data Collection

 Voltage Current Units (in Volts)

Middle

9.60

3.05

9.50

3.68

9.40

4.16

9.30

4.84

9.20

5.55

9.10

6.06

9.00

6.83

Data Analysis Conclusion/Evaluation

The electromotive force that we should have obtained is 12.0 Volts. (We know this

Conclusion

In order to get more accurate data, we first need to change the resistor in the Rheostat for another conductor such as plain wire. We should also have considered the thermal factor and should maintain constant temperature for the Resistor. There should be intervals between trials for cooling down. In addition, we need to use more conductive metal for the clip such as Aluminum or even Gold.

EMF and Internal Resistance of a cell

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

Found what you're looking for?

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

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 International Baccalaureate Physics essays

1. Centripetal Force

?t = �0.005 s 1 7.16 2 7.25 3 6.79 4 7.72 5 6.40 6 8.04 7 7.84 8 7.41 9 6.32 10 6.53 Table 3.4 Result of time taken for 10 revolutions for mass 40 g Trial Time Taken t(s)

2. Investigating the induced emf with the number of windings and different heights

dropping through the coil, but it is leaving the coil in the opposite direction which make the magnitude negative. Another thing that is significant is when the south pole exits the magnetic field on the graph. The maximum induced emf is slightly larger than the north pole of the magnet.

1. Resistance Lab. Aim - To investigate the effective resistance (total resistance) of ...

(40.167 + 40.375)/2 = 40.271 * Graphs of Results - Refer to attached graphs sheets for the graphs of the results. ==> Observation - Thus, from the above results we can observe that from the readings of our experiment the average effective resistance of the three resistors connected in

2. Investigating Wires

Therefore we are going to be recording the data for three trials. 7. After that we primarily repeat steps 4 to 6 for different lengths of nichrome wire. Diagram- Raw Data- Table 1 illustrates the voltage and current readings from different lengths of wires (after 30 seconds) Length (�0.0005 m)

1. design of a variable resistor

Calculate the resistance using Ohm's Law. Length 1. Set up the circuit shown. 2. Cut one type (thickness - thinnest) of wire into 10cm, 15 cm, 20 cm 3. Connect the thinnest wire to the orange part on the diagram 4. Record the voltage and ampere 5.

2. EMF and Internal Resistance of a cell

The values I obtained are EMF = 2.402V and r = 3.814?. The literature value for EMF was 2.35V, because when I was recording results, I obtained this value for voltage when current equaled zero. The literature value and the experimental value have a relatively small difference, which indicates that the experiment could be considered successful to some extent.

1. HL Physics Revision Notes

f Doppler Effect for light: ??= ?? (1+v/c) / (1-v/c) 11.3 Diffraction: 11.4: Resolution: 11.5: Polarization: Topic 12: Electromagnetic Induction: Describe the inducing of an e.m.f by relative motion between a conductor and a magnetic field When a conductor moves through a magnetic field, an electromotive force is induced.

2. How does the sinkage depth of a tyre affect its rolling resistance ?

Crr or the rolling resistance force for a pneuamatic tire can be defined by the equation ( Hibbeler, R.C. 2007) Crr = The experimental rolling resistance is defined in the equation below Fr = N x b / r - 1) • Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work 