LABORATORY APPARATUS - USES

LABORATORY APPARATUS - HOW TO USE AND WHAT ARE THEIR ADVANTAGES ? 1, I am ‘Test tube’…..! A test tube is a clear glass or plastic container that is much longer than its wide, commonly has a U-shaped bottom and has an open top.  Glass and special plastic test tubes are also non-reactive.  Many metals react with all sorts of chemicals in ways that would ruin an experiment or sample.  Chemists use test tubes to mix, heat...

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CONCENTRATE ON THESE.......FROM THE EXPERIMENTS......

A QUICK REVISION USING THESE QUESTIONS.....BASED ON EXPERIMENTS ..... TYPE THE ANSWER IN THE BOX  1. WHEN CURRENT IS PASSING THROUGH THE MAGNETIC NEEDLE IS 2. MAGNETIC NEEDLE IS DEFLECTED ONLY DUE TO 3. WHEN CURRENT PASSES THROUGH A COPPER WIRE OR A CONDUCTOR IT PRODUCES 4. THE DISTANCE BETWEEN CONVERGED OR DIVERGED POINT TO SURFACE IS CALLED 5. THE LINE JOINING THE CONVERGED OR DIVERGED POINT TO PINS IS CALLED 6. WHEN ALL PINS POSITIONS ARE EXTENDED BACK OR FRONT THEY WILL MEET AT A POINT THAT POINT IS CALLED...

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PHYSICS FORMULAS AND PRACTICE PROBLEMS

REFLECTION AT CURVED SURFACES & REFRACTION AT CURVED SURFACES: 1. Magnification : m = -v/u  or m=hi/ho 2. Mirror formula, 1/f = 1/u + 1/v 3. focal length f = R/2 4. Lens formula 1/f = 1/v - 1/u 5. Lens makers fomula :  1/f = (n-1) (1/R1 - 1/R2) 6. The relation between refractive indices of media, object distance, image distance, and radius of curvature is given by :                                      ...

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A QUICK REVISION - PHYSICAL SCIENCES

Are you ready? ........... I : REFLECTION and REFRACTION AT CURVED SURFACES  1. Predict, Which mirror is used as rear view mirror ?  2. What is the unit of the power of the lens? Define one dioptre. (adsbygoogle = window.adsbygoogle || []).push({}); 3. Suppose that a person is using a concave mirror for shaving, Where should he place his face in front of the mirror? 4. Explain the refraction of light at plane surface and curved surface? When a ray of light passes from a denser medium to rarer medium which angle...

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