Magnetising Iron Bar

#Magnetizing_Ironbar 

Magnetizing a Soft Iron Bar with the Strong Permanent Bar magnet

1. When Strong Permanent Bar magnet is away, all tiny magnetic dipoles in Fe are
   oriented in different directions, with out any alignment

2. When Strong Permanent Bar magnet approaches closely, all tiny magnets align 
   in the same direction of the Permanent magnet so that all S-pole directed towards
   the N-Pole

Gausse's theorem - Animation

# ELECTROSTATICS  #Gausses_theorem

Gauss's Law

Gauss's theorem in electrostatics states that the total electric flux through any closed surface is equal  1/ ε₀ times the net charge enclosed 

Electric field lines from a point charge. The charge is placed at the center of an imaginary sphere ( Gaussian Sphere). Electric field lines start from  positive charge at center and penetrates out through the surface of the sphere.  Here All lines ( 8 lines ) are passing perpendicular to the surface, so we can Count them for FLUX THROUGH THE SURFACE.  Here flux through the surface is 8

DHSE Physics Practicals

 

Cycle 3 - Physics Practical

1. Concave Mirror

Aim

1. Find focal length of concave Mirror using u - v method

2. Find focal length of concave Mirror using u v graph

3. Find focal length of concave Mirror using 1/u - 1/v graph

4. Find focal length of concave Mirror using distant object method

5. Find focal length of concave Mirror by Normal Incidence method

2. PRISM

Aim

1. Drawing i - d curve, find angle of minimum deviation 

2. Find refractive index of material of Prism

3. Convex Mirror

Aim

1. Find focal length of concex mirror using convex lens

4. Resonance Column

Aim

1. Find velocity of sound at room temperature  , Vt 

2. Find velocity of sound at zero degree celsius   , Vo

3. Find Unknown frequency of turning fork

5. Ohms Law II

Aim

1. Very ohms law, in combination of resistance 

a) In series

b) In parallel

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Cycle 2 - Physics Practical

 

1. MOMENT BAR

Aim

1. To find unknown mass using moment bar

2. HELICAL SPRING II

Aim

1. To find spring constant of the spring using Oscillation method

3. CONVEX LENS

Aim

1. Find focal length of convex lens using u - v method

2. Find focal length of convex lens using u v graph

3. Find focal length of convex lens using 1/u - 1/v graph

4. Find focal length of convex lens using distant object method

5. Find power of convex lens

4. LIQUID LENS

Aim

1. To find Focal length of Liquid lens

5. OHM'S LAW

Aim

1. To find Resistance of wire using Ohm's law

2. To find Resistance of wire using V - I  graph

3. To find Resistivity and Conductivity  of wire

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Expt1: Vernier Calipers

Write on Right Side of Page

Write on Left Side of Page

VERNIER CALIPER TEACHING VIDEO

Physics Practical Cycles - HSEII

 

 Physics Practical

• WRITE ON A 200 PAGE NOTE BOOK

• NAME THE BOOK AS "PHYSICS PRACTICAL ROUGH RECORD"

• COPY THE BELOW GIVEN, 5 EXPERIMENTS AND THEIR AIMS

1. VERNIER CALIPERS

Aim

1. To find volume of rectangular block and Cylinder
2. To find Internal volume of Calorimeter

2. SCREW GAUGE

Aim

1. To find diameter and Volume of given wire
2. To find area and volume of a glass plate

3 . HELICAL SPRING

Aim

1. Find Spring constant of spring using Load -extension method
2. Draw load - extension graph and find Spring constant from graph

4. SIMPLE PENDULUM

Aim

1. To find the relation between length and Period of a simple
Pendulum.
2. Find acceleration due to gravity using calculation
3. Find acceleration due to gravity from l / T2 graph
4. Find length of Second’s pendulum
5. Find length of pendulum having time period, 1.5 second
6. Find Period of pendulum having length 95 cm

5. PARALLELOGRAM LAW OF FORCES

Aim

1. Find mass of a given body , by parallelogram law
Apparatus

 

2024 +2 Model Exam / Physics - question paper and Answer Key

Second Year HSE

Model Exam 2024

Physics

Q/A 

ANSWER KEY

PLUS TWO - CHAPTER 1 : ELECTRIC CHARGES AND FIELDS

 PLUS TWO  -  CHAPTER 1 :  ELECTRIC CHARGES AND FIELDS

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Plus 1 / S1B / Physics

Chapter 2	Units and Measurements	Download class note
Chapter 3	Motion in one dimension	Download class note
Chapter 4	Motion in a Plane	Download class note
Chapter 5	Laws of Motion	Download class note
Chapter 6	Work Power Energy	Download class note
Chapter 7	System of Particles and Rotational motion	Download Class note
Chapter 8	Gravitation	Download Class note
Chapter 9	Mechanical Properties of Solids	Download Class note
Chapter 10	Mechanical Properties of Fluids	Download Class note
Chapter 11	Thermal Proterties of Matter	Download Class note
Chapter 12	Thermodynamics	Download Class note
Chapter 13	Kinetic Theory	Download Class note
Chapter 14	Oscillations	Download Class note
Chapter 15	Waves	Download Class note
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Plus 2 SECOND TERMINAL PHYSICS DECEMBER 2019 - question and answers

HSE II / +2 / PLUS 2 : SECOND TERMINAL
 PHYSICS DECEMBER 2019

Question paper and Answer key

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plus -1 HIGHER SECONDARY MODEL EXAMINATION, FEBRUARY 2020 - Question and Answer

FIRST YEAR HIGHER SECONDARY MODEL EXAMINATION FEBRUARY 2020

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Plus 1 - 2019 - Physics Model question paper and answer key

Plus 1 -  2019 - Physics Model question paper and answer key

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Question paper - 2019 Model physics (+1)

Answer key of physics Model exam DHSE 2018

Answer key of physics Model exam DHSE 2018

Question paper of physics Model exam DHSE 2018

Plus1 previous Question papers

Model examination  Feb 2013 - Physics
Class : plus1 (HSE 1)
Syllabus : SCERT / NCERT

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Plus 1 : UNITS AND MEASUREMENTS

CHAPTER 1 :UNITS AND MEASUREMENTS

1. WHAT IS A PHYSICAL QUANTITY?  GIVE EXAMPLES?

Any thing that can be measured is a physical quantity.  Example : length, mass, time

Velocity, density

2. What is a Unit?  Give examples?

Units are certain reference standards used for making measurements.

Example:  m/s, kg/ m³,  Km, Kg

3. What are fundamental quantities and fundamental Units?

   The physical quantities mass, length and time are known as fundamental quantities.

They are called so because, Units of all other quantities in mechanics can be derived from fundamental units.  Also they can not be sub divided in to smaller units

Units of fundamental quantities are known as fundamental units.

 (meter , kilogram, second )

4. What are derived quantities and derived units?

      Physical quantities that can be expressed in terms of fundamental quantities are

     known as derived quantities.

      (example : m/s  , m/s², m³ )

      Note:   Two parts for measured result:

     Any measurement has two parts

1. Its magnitude
2. Its Unit

If we decrease the size of the unit, the numerical; value will increase.

1 Km  = 1000 m

Here Km is a large unit of length, while magnitude is 1

But, meter is a small unit of length and its magnitude is 1000

Smaller the size of the unit, greater is its numerical value.

5. What are the characteristics of a unit , that is chosen for making measurement ?

The unit that is chosen for making a measurement should have the following properties:

1. It must be well defined.
2. It should be of suitable size
3. It should be accepted internationally
4. It should not change with change in temperature, pressure ,etc

6. What are the different system of units ?

CGS – Centimeter, gram , second

       FPS – Foot, Pound, Second

       MKS – Meter, Kilogram, second

7. What are the physical quantities and units in SI system?

7 Basis physical quantities  of SI unit system are

Length	meter	M
Mass	Kilogram	Kg
Time	Second	S
Temperature	Kelvin	K
Electric current	Ampere	A
Luminous intensity	Candela	Cd
Quantity of matter	Mole	mol

2 Supplementary quantities of SI system are

Plane angle	Radian	rad
Solid angle	Steradians	sr

8. Define 1 meter in 3 ways ?

1)      It is 1 / (10⁷) th of the distance from north pole to equator of earth

1 meter - old definition

2)      1 meter is the distance between two lines marked on a Platinum-Iridium rod

Kept at a constant temperature of 273.16 K and at  1 bar pressure in the

International bureau of weights and measures at severs near Paris in France.

3)      1 meter is  equal to 1650763.73 times the wavelength of orange red light

Emitted by Kr-86 source, kept at triple point of Nitrogen.

 

Many units to measure length

1 Km = 10³ m

1 deci meter = 10^-1 m

1 centi meter = 10^-2 m

1 milli meter = 10^-3 m

1 micro meter = 10^-6 m

1 angstrom = 10^-10 m

1 fermi = 10^-15 m

9 .   Define 1 Kg

1 Kg is equal to the mass of Platinum – Iridium cylinder of diameter equal to its height, kept at international bureau of weights and measures.

Definition of 1 Kg

Many units to measure mass

1 Kg = 1000 gm

1 Ton = 1000 Kg

1 Quintal = 100 Kg

1 gm = 1000 mg

       10. Define 1 second

(a)    1 second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of  Cesium – 133 atom in ground state.

(b)   1 second is defined as 1 / (86,400) th  part of a mean solar day.

Mean solar day is the average of all solar days in a single year.

    

11. Define  1 Ampere

1 Ampere is that constant current which if maintained in two straight parallel conductors of infinite length , of negligible cross section and placed 1 m apart in vacuum , would produce between these conductors a force equal to  2 x 10 ^-7 N

12. Define 1 Radian

1 Radian is the plane angle between two radii of a circle which cutts off on the circumference an arc equal to the radius of the circle.

1 radian

360 degree  =  2 ∏  radian

There for,  1 radian  = 180 / ∏  degree

13. Define 1 Steradian

1 Steradian is the solid angle which with its vertex at the center of a sphere cuts off an area on the surface of the sphere equal to that of a square having sides of length equal to the radius of the sphere.

Order of Magnitude

To estimate how big or small a given physical quantity , we can use the idea of

Order of magnitude.

The given magnitude is expressed as    a x 10 ^b

Where  ‘a’ is a number between 1 and 10

Number  ‘b’ can be +ve or –ve

If  a >  5 , then order of magnitude = b+1

If  a < =5, then order of magnitude = b

For example :

    Diameter of earth 1.28 x 10⁷ m

     Order of magnitude = 7 and it is of the Order of 10⁷

 

     Distance between two points is measured as  7.25 x 10^-10 m

      Its order of magnitude is 10^-9  and It is of the Order of 10^-9