### PHYSICS PRACTICALS AREA OF CONCENTRATION

PHYSICS PRACTICALS AREA OF CONCENTRATION💯💯

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NUMBER 2

Make sure you use almost that of your teacher value rapport with him or her to find out .

Note your👇👇

**Observation W = ????
**I°,d(cm),L(cm),e/°,Φ/°,Φ = I + e/° any one asked 🚬🌪️🌪️💯
**Scale eg. Let 2cm represent 0.1unit on cos Φ axis
Let 4cm represent 0.1unit on sin I axis
Depending on what you are ask to place on the graph 👆👆
**Slope
**Intercept on the vertical/horizontal axis if asked.💯
*Make sure your graph, scale, and, intercept are well drawn and taken

#PRECAUTIONS:

I. I ensured neat traces by using sharp pencil.
II. I ensure that the pins are vertically erect.
III. I ensure that the pins are well spaced which is 4cm apart.
IV. I avoided parallax errors when reading protractor.
V. I avoided error due to parallax when reading the metre rule.

Study this incase if asked ..👇👇 🚬🌪️🌪️

A. State the conditions necessary for total internal reflection of light to occur.

B. The Critical angle for a transparent substance is 39°. Calculate the refractive index of the substance.
C. State snell’s law
D. Calculator the critical angle for a water – air interface [ refractive index of water = 4/3 ]
WORKINGS ✍🏿✍🏿

A. I. Light must be traveling from a denser medium to a less dense medium.
II. The angle of incidence in the dense medium must be greater than the critical angle.

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B. Refractive index 👎 = 1/sinC = 1/Sin39° = 1/0.6293 Therefore, n = 1.59

C. Snell’s law state that the ratio of the angle of refraction is a constant for a given pair of media.

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D. 1/SinC = a ^N w Therefore, SinC = 3/4 = 0.75 Hence C = Sin inverse 0.75 = 48.6

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MT 💯💯

Study It area of concentration no. 2

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NUMBER 3. STUDY WELL 💯💯💯 OJCA✍🏿✍🏿✍🏿

Same as num 2 rapport with your teacher to get almost the value of his 💯💯

## Make sure your readings, graph, scale and intercept are well drawn and taken

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Precautions _OJCA

I. I ensured Tight connections.
II. I noted the zero error on the ammeter and voltmeter.
III. I avoided error due to parallax when reading the ammeter and voltmeter.
IV. I ensured that I remove the key when readings are not been taken to prevent the cells from running down.

# Study this incase if asked👇👇

A. Two method by which electric current can be produced

B. Explain why E. M. F. of a cell is greater than the PD. across the cell when it is supplying current though an external resistance

C. Define potential difference between two points in an electric circuit.

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#WORKINGS ✍🏿✍🏿

A. Electric current can be provided using:
I. Chemical Cells
II. Generator
III. Solar Cells
IV. Gas Turbines
V. Hydro Power
VI. Wind Mills
Vii. Geothermal
Viii. Nuclear Power

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B. E. M. F. (E) is the Work done across external resistance (R) and internal resistance of the cell (r) While (PD) [v] is the work done across external resistance (R) only, hence, emf of a cell is greater than the PD across the cell.
Therefore, E = V + Ir

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C. The potential difference between two points in an electric circuit is the Work done in Joules (J) in moving a charge of one Coulomb (c) from one point to the other..

Make sure you study this💯💯👆👆

Goodluck

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