Physics Formulas And Defination

physics formulas, all physics formulas
on 2 March 2019, 1:30AM
  • potential energies
  • amount of work
  • unit of work
Physics Formulas And Defination..Download PDF

1 Motion
The motion of an object moving at a uniform acceleration is described by 3 equation
v = final velocity, u = initial velocity, a = acceleration, t = time taken

2 FORCE
(i) First law of motion give the definition of force
(ii) Newton’s second law of motion gave the of formula of force
(iii) Momentum
(iv) Dyne is a CGS unit of Force 1N = 105 dyne

3 GRAVITATION
(i) Gravitation force
(ii) G = 6.67 × 10⁻¹¹ Nm² /kg²
(iii) Accleration due to gravity
(iv) g = 9.8m/s²

4 Pressure
SI UNIT of pressure is = Pascal (Pa) Or Newton / m²

5 BUOYANCY
upward force experienced by and object when it is immersed into a fluid

6 Density

7 ARCHIMEDES PRINCIPLE
Apparent weight = weight of body– upward thurst

8 Density
(i) SI unit = Joules
(ii) Kinetic energy= ¹/₂mv²
(iii) Potential energy = m × g × h
(iv) Mechanical energy = K.E.+ P.E.

9 POWER

10 Law of conservation of energy – Energy can neither be created nor be destroyed. Total energy system remain constant.

11(i)Formula of lens= 1/f= 1/v-1/u
(ii)Formula of mirror=1/f=1/v+1/u
(iii)Formula of power of lens P=1/f
(iv) Unit of power of lens = dioptre
(v)Ohm’s Law V = I R
(vi)Resistance of resistor connected in parallel 1/R =1/R₁ + 1/R₂ + 1/R₃
(vii)Resistance of resistor arranged in series Rs= R₁+ R₂+ R₃
(viii)Formula of electrical power P = V × I, P= V²/R, P= I² R

12 The commercial unit of electrical energy is – Kilowatt hour (KWh) = 3.6 × 10⁶J

13 Resistivity (P)= R x A/l

14 Formula of electric current I=Q/T

15 Formula of heat produced in a wire – H = I² × R × t
Also known as Joule’s Law of Heating H = P × t, H=V l t

16 Potential difference (V)

17 W = V × Q

Newton Law Questions

Have a look on

1 The reaction which is used to convert carbonate ore to oxide in the absence of air is known as

a) Roasting
b) Chemical reduction
c) Calcination
d) Reduction

2 Which of the following is not the ore of iron

a) Bauxite
b) Haematite
c) Siderite
d) Magnetite

3Which of following is not the ore of iron

a) Iron pyrites
b) Azurite
c) Limonite
d) Haematite

4 The reaction which is used to convert sulfide ore into oxide in the presence of air is known as

a) Roasting
b) Calcination
c) Chemical reduction
d) Reduction

5 Which of the following is not the ore of copper

a) CUPRITE
b) Copper pyrites
c) Calamine
d) Copper glance

6 Which of the following is the ore of lead

a) Haematite
b) Cerrusite
c) Zincite
d) Malachite

Most important

7 Which of the following is the ore of aluminum

a) Zincite
b) Zinc blende
c) Corundum
d) Calamine

8 Formula of chalcopyrite

a) Cu₂O
b) Cu₂N
c) Cu₂S
d) Cu₂C

9 The formula of sodium oxide

a) Na3O
b) Na4O
c) Na₂O
d) Na₂O₂

10Which of the following is the ore of mercury

a) P b S
b) C I S
c) Hg S
d) Zn S

11Formula of potassium oxide

a) KO₂
b) K₄O₂
c) K₂O
d) K₂O₄

12Formula of Haematite

a) Fe₂O₃
b) Fe Co₃
c) Fe 3O₄
d) Fe Cl₂

Questions

13Formula of chromic oxide

a) Cr₂O
b) CrO₃
c) Cr₃O
d) CrO₂

14Formula of siderite

a) Fe ₃O₄
b) Fe₂O₃
c) Fe Co₃
d) Fe Cl₂

15Formula of Ferric chloride

a) Fe Cl₂
b) Fe O₃
c) Fe Cl₃
d)Fe O₂

16 2 ZnS + 30₂ → 2 ZnO + 2SO₂ which type of method is used for the conversion of sulfide ore into oxide in the above reaction

a) Calcination
b) Chemical reduction
c) Roasting
d) Reduction

17 The formula of zinc blende

a) ZnS
b) Zn CO₂
c) Zn SO₂
d) Zn Cl₂

18 Which of the following is the ore of copper

a) Zincite
b) Haematite
c) Cerrusite
d) Malachite

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