Question

observation
table of physics experiment​

Answer 1

Hello! friends, got no time or no friends to borrow physics practical file reading and you need it badly right now : here is your solution:
The return of my doomed work. I deleted my post by accident. But worry not friends.
I recovered the lost copy of this blog and it is back to help you again.
School is for enjoyment and sometimes we tend to left out few of the practicals.
That is not a problem anymore.
Before the submission of my practical file during the board exams. I knew that some scary looking teacher would just tear the file apart so that it cannot be used again.
Physics file was the most difficult to maintain, all the reading and so much calculation.
I thought in the day of my desolation when no one would share the file or they themselves have not completed it or maybe have done the whole practical wrong, interred a sense of Board Exam in my bones.
Most of the practicals screenshot have been listed below with exact numbering.
If you find anything missing or above your head, do post some comments as there are many others who visit this site and these might be able to help you out of this muck.
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EXP-1> TO DETERMINE THE RESISTANCE PER CM OF A GIVEN WIRE BY PLOTTING A GRAPH OF POTENTIAL
DIFFERENCE VERSUS CURRENT
Materials Required : A Resistance wire, voltmeter, ammeter, battery, rheostat, meter scale, one way key, connecting wires etc.
Theory: If I be the current flowing through a conductor & V be the potential difference across its ends, then according to Ohm’s law
Where, R is the constant of proportionality. It is known as resistance of the conductor.
V/I=R
R depends upon the nature of material, temperature & dimensions of the conductor.
Procedure:
1. Clean the ends of the connecting wires with the help of sand paper in order to remove any insulating coating on them.
2. Connect various components - resistance, rheostat, battery, key, voltmeter and ammeter
3. Note whether pointers in milli-ammeter and voltmeter coincide with the zero mark on the measuring scale. If it is not so, adjust the pointer to coincide with the zero mark by adjusting the screw provided near the base of the needle using a screw driver.
4. Note the range and least count of the given voltmeter and milliammeter.
5. Insert the key K and slide the rheostat contact to one of its extreme ends, so that current passing through the resistance wire is minimum.
6. Note the milli-ammeter and voltmeter readings.
7. Remove the key K and allow the wire to cool, if heated. Again insert the key. Shift the rheostat contact slightly to increase the applied voltage. Note the milli-ammeter and voltmeter reading.
8. Repeat step 7 for four different settings of the rheostat. Record your observations in a tabular form.
OBSERVATIONS :
1. Range of ammeter = 0 ... mA to ...mA
2. Least count of ammeter = ... mA
3. Range of voltmeter = 0 ... V to ...V
4. Least count of voltmeter = ...V
5. Least count of meter scale = ... m
6. Length of the given wire, l = ...m
RESULT:
1. The potential difference across the given wire varies linearly with
the current.
2. The resistance per unit length of the wire is (R ± ΔR) = (... ... Ωm-1).
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EXP-2> TO DETERMINE RESISTANCE OF GALVANOMETER BY HALF DEFLECTION METHOD AND TO FIND ITS FIGURE OF MERIT.
MATERIAL REQUIRED: A moving coil galvanometer, a battery or a battery eliminator (0 - 6 V), one resistance box (R-BOX 1) of range 0-10kΩ, one resistance box(R-BOX 2) of range 0-200Ω, 2 one way keys, voltmeter, connecting wires and a piece of sand paper.
Theory: Galvanometer is a sensitive device used to detect very low current. Its working is based on the principle that a coil placed in a uniform magnetic field experiences a torque when an electric current is set up in it. The deflection of the coil is determined by a pointer attached to it, moving on the scale. When a coil carrying current I is placed in a radial magnetic field, the coil experiences a deflection θ which is related to I as I=kθ
where k is a constant of proportionality and is termed as figure of merit of the galvanometer.
Procedure: