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29-01-2013, 09:23 PM
Post: #1
cbse 12th physics investigatory project with observations

Aim: To trace the magnetic lines of force of a bar magnet.
Apparatus: 2 Bar magnets, thick paper, iron filings etc.
Theory: Many similarities exist between electric and magnetic phenomena. A magnet has two opposite poles,
referred to as north and south. Opposite magnetic poles attract each other, and similar magnetic poles repel
each other, exactly as happens with electric charges. When a magnet is kept at a place, it influences the space
surrounding itself. The effect a magnet has around its surrounding is called the magnetic field of the magnet.
Magnets are surrounded by magnetic fields. A magnetic field can be thought of as consisting of lines of force.
The forces of magnetic attraction and repulsion move along the lines of force. A magnet has two opposite
poles, referred to as north and south. Opposite magnetic poles attract each other, and similar magnetic poles repel
each other, exactly as happens with electric charges.
Figure 1 Figure 2
Figure 3 Figure 4
The force with which magnetic poles attract or repel each other depends on the strength of the poles and the distance
between them. The properties of lines of force can be enumerated as:
1. They are said to originate from the north pole and end at the south pole. This is only a convention.
2. The lines of forces of a particular magnet do not intersect with each other.
3. Tangent to the line of force gives the direction of the magnetic field acting at that point.
4. A line of force is continuous: starts from the North Pole and ends at the South Pole.
5. There is no line of force within the magnet.
Procedure : In the following experiment you will trace the magnetic lines of force of a bar magnet .The bar magnet is
placed on
a surface containing iron filings.
1. Place a plain, thick paper on a table and support it such that it remains flat.
2. Spread fine iron filings on the paper & Place a bar magnet on the paper
4. Tap the paper gently. Write detailed observation regarding the arrangement of iron filings around the magnet
5. Now take 2 bar magnets and place them as show in figure 1, 2 and 3 respectively.
6. Write detailed observation regarding the arrangement of iron filings around the magnets The iron filings line up
along the magnetic field lines of the magnet. Note the circular pattern of the field lines.
By convention, we say that the field lines emanate from the north pole of the magnet and re-enter the magnet
through the South Pole. Note also that the field lines are closer together at the poles than at the center of the
magnet. More iron filings are attracted to the poles because the strength of the magnetic field is greater at the poles.
09-06-2014, 08:25 AM
Post: #2
RE: cbse 12th physics investigatory project with observations
this is for a 10th class student not a 12th one
27-01-2015, 10:31 AM
Post: #3
RE: cbse 12th physics investigatory project with observations
please, give me investigatory project on "charging and discharging of capacitor"
31-10-2015, 09:50 PM
Post: #4
RE: cbse 12th physics investigatory project with observations
please give an investigatory project on diffraction of light for class 12 cbse
29-10-2016, 12:55 PM
Post: #5
RE: cbse 12th physics investigatory project with observations
I need cbse 12th physics investigatory project with complete observation details
31-10-2016, 01:10 PM
Post: #6
RE: cbse 12th physics investigatory project with observations

Selective Isolation and Manipulation
Semiclassical Method to Predict Helium
Across the Universe
Cosmic Ray Shower Array Reconstruction
Cold Nuclear Fusion
Brass Instruments and Artificial Lips
Analysis of Black Hole Thermodynamics
181.4°C in the Sun
AC Transformer
Analysis of Voice Frequency across Ethnic Identities
Zero Gravity Elevator Experiment
Voltage Regulator Using Zener Diode
Using Sound to Measure Temperature
To Study the Variation of Electrical Resistance
To Determining the Time Constant for an RC Circuit
To Demonstrate the Production of Induced EAIF
To Demonstrate The Phenomenon Of Total Interval Reflection
To Calculate the Specific Heat Capacity of Water
The Solar Heating and Night Cooling of Surfaces
The Most Efficient Automobile Sunshade
The Liquid Lens
Study of Diffusion of Solids in Liquids
Refractive Indices of Water And Turpentine Oil
Study of Constituents of Alloys
Photoresistor
Make a Telescope
Logic Gate
Investigate the Relation between Output and Input Voltage
How Fish Achieve Neutral Buoyancy
Electronic Eye
A Dying Star
Analysis of Voice Frequency across Ethnic Identities
A New Perspective with a Digital Pinhole
Are There More Cosmic Rays at Higher Altitudes
Chill Out
Does Horizontal Speed Help
Effect of a Magnetic Field and Applied Voltage
Effects of Rotational Inertia on a Fastball
Evaporation Sensation
Glassic Music
Glassic Music
How Do Varying Amplitudes
Marco Polo
Mechanical Exfoliation
Photoelectrochemical Cell
Photometric Study of Eclipsing Binary Stars
Proving Universal Gravitation by Warping Space-Time
Reflections on Reflection
Relativistic Stress
Rubens Tube
Seeing Through the Haze
Sink or Float
Solar Cells
Sta-Netic
Study of the Effect of the Curvature of Spacetime
Testing Gas Laws
The Mathematics of Sympathetic Vibrations
The Metal Meltdown
Tricky Curie
Which Diameter String Has the Purest Tone
Will a Guitar String Vibrate Forever
Effectiveness of Recycled Materials as Thermal Insulation
Creating Sound with Heat
Quantifying the Effect of Skyglow on the Visibility of Stars
Frequency Relationship of Notes in Musical Harmony
Radioactive Attenuation and the Inverse Square Law
Densitys Effect on Amplitude
Does the Rate of Heating Have an Affinity for Salinity
Testing Sound Decay in Different Gasses
Direct Solar Pool Heater
Count on Calories
The Focalization of Sound
Tempest in a Teacup
Safely Thawing Meat Used while Backpacking
Determining the Type of Particle in an Air Sample
Doppler Effect and the Fiber Gyroscope
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