Physics Learn: June 2024

Sonometer relation between frequency and the length, GSEB physics practical std 11 & 12

Sonometer

Sonometer

AIM :-

To study the relation between frequency and the length of a stretched string with the help of a sonometer.

PRECAUTIONS

1 The wire should be of uniform cross-section and there should not be any twist or bend in it.

2 The pulley should rotate without friction.

3 Put that much weight in the pan so that the deformation produced in the wire should not exceed the elastic limit.

4 The stem of the tuning fork, not its prongs, should be placed on the sonometer box or on the support.

Apparatus:- A sonometer, tuning forks ( of frequencies from 256 Hz – 512 Hz), a pan or a hanger of known weight, four to five 500 gm weights, a paper rider, a rubber-pad and a meter rule.

Sonometer Apparatus

Sonometer Practical

OBSERVATION TABLE

Sonometer reading

Sonometer Graph

For more details View Video.

To study the relation between frequency and the length of a stretched string with the help of a sonometer.

RATE OF FLOW OF WATER physics practical GSEB std 11 & 12

RATE OF FLOW OF WATER

AIM :-

Fill water in a cylinder vessel, connected with a capillary, upto some height h_o. Allow water to flow through capillary in a controlled way and measure the height (h) of water, in vessel, at regular intervals (t) of time. Take ten such observations. Draw a graph of h ® t and find the half-life of the flow of water.

Apparatus :

Ø A burette

Ø A stand

Ø A beaker

Ø A stop-watch

Ø A capillary of fine bore

Ø A rubber tube

Ø A pinch cock

Ø water

Rate of flow of water apparatus

Rate of flow of water Practical

Calculation

Rate of flow of water observation table

Rate of flow of water graph

Rate of flow of water calculation

Graph of rate of flow of water

For more details view Video.

RATE OF FLOW OF WATER

Copper voltameter, to determine the electro chemical equivalent of copper, physics practical std 11 & 12

Copper voltameter

Copper voltameter

AIM :-

Connect given copper voltameter in an appropriate circuit determine the electro chemical equivalent of copper.

PRINCIPLE :-

On passing electric current through CuSO₄solution, Cu⁺² and SO^-2₄ ions are separated or chemical effect of electric current.

PRECAUTIONS

The cathode plate should be throughly cleaned after rubbing with sand paper.

Pass only that much current as is obtained from the calculation of the area of the immersed part of the cathode plate.

Use only a fresh solution of CuSo₄. To prepare the solution dissolve about 25 g of CuSO₄ crystals in 100 cm³ water. Add a few drops of sulphuric acid (H₂SO₄) to make it more conducting.

Hold the plate from its upper end so as to avoid touching its surface.

Cathode plate should be washed immediately after it is taken out of the solution.

PROCEDURE :-

1. To Cathode plate dip in clean water, and wash off all the CuSO₄, solution sticking to it. Thereafter wash it again with tap water.

2. Hold it in the sunshine for some time till it dries out. Now find out its mass by Physical balance.

Anode, Cathod, Sulphuric, Copper, voltameter,

Electric, Solution, Water,

Copper voltameter apparatus

Copper voltameter line diagram

Copper voltameter practical

Copper voltameter practical result

Table of Copper voltameter result

Calculation of copper voltameter

For more details View Video.

Copper voltameter.

Ohm's law physics practical for ITI fitter & GSEB Std 8 & 12

Ohm's Law

Ohm's Law

AIM :-

A voltmeter, a current meter, and an unknown resistance etc. are given to you. Prepare an appropriate circuit to verify Ohm’s law. With appropriate values of current and voltages, only with the help of calculations, determine the value of unknown resistance.

PRINCIPLE

Potential difference in a conductor produces electric current.

APPARATUS :-

A unknown resistance,

a voltmeter (0 - 10 V),

a milliammeter (0 - 500mA), a battery,

a rheostat,

a tap key,

connecting wires.

PRECAUTIONS : -

All the connections must be tight.
Plastic or rubber should not be pressed below the connecting terminals.
When current does not flow in a circuit the pointer in both ammeter and voltmeter must be on zero. If it is not so then adjust the pointer on zero or consider the zero error.
Range of the meters must be appropriate.
Choose a proper scale while plotting the graph so that the graph is sufficiently large and it occupies most part of the graph-paper.