CBSE ADDA

            (Practice) MCQ of Electricity 1.Electricity constituted by electric charges at rest on the surface of a conductor is called a. Electricity b. Potential difference c. Current electricity d. Static electricity  2.The closed path between two points at different potentials, to make the electric current flow is called a. Electric circuit b. Electric current   c. Electric potential d. Electric cell. 3. Direction of conventional current is taken from a. Negative to positive b. Positive to negative c. It could be from positive to negative or negative to positive d. None of these. 4. With increase in temperature, resistance of a conductor  a. Decreases                                                      b. Increases       c . May decreases or increases depending on temperature   d. It does not depend on temperature. 5. In series combination, resistance increases due to increase in

CBSE PHYSICS: CBSE X Current Electricity Worksheet : Chapter: Current Electricity Worksheet          By Jsunil Tutorial  1. Define electric current, state its unit, list the equation defining... CBSE PHYSICS

FORCE AND PRESSURE A force is a push or pulls acting on an object which changes or tends to change the state of the object. In the international system of units (SI System), the unit of force is Newton (N) that is named after Sir Isaac Newton. There are also other units like dyne, kilogram weight and pound. Action of force and its effects:  Contact and non-contact forces A force f orces which act only when there is physical contact between two interacting objects are known as c ontact forces.  Forces which can act without physical contact between objects, i.e. those that can act from a distance, are called non-contact forces or field forces. Types of forces 1. Muscular force: This is the force we can exert with our bodies by using our muscles, e.g. pull, push, kick etc. These are contact forces 2. Magnetic force : Magnets exert forces of attraction or repulsion on other magnets. An important feature of magnetic force is that it can act from a distanc

Class 8 S. No. Chapters  Tutorials  Videos  Practice  Interactivities  Assessments   1. Rational Numbers    1     1 1   1    2     2. Linear Equations in One Variable    1    2    3   1 1    2    1   2    3        3. Understanding Quadrilaterals    1    2    3   1    1      1    2    3   4    1      4. Practical Geometry    1    2    3   1            5. Data Handling    1    2    3   1        1    2    3    4  5      1    2    3  6. Squares and Square Roots    1    2    3   1 1    2    3    1    2     1    2     7. Cubes and Cube Roots    1    2    3   1 1   2      1      8. Comparing Quantities    1    2    3     1   1        1    2      1   2    3   4    5  9. Algebraic Expressions and Identities    1    2    3   1 1    2    3 1     1    2  10. Visualising Solid Shapes    1   2     1 1   2   3   4   5    1     11. Mensuration    1    2    3   1     1    2    3    1      12. Exponents and Powers    1    2     1 1    2    3   4 1   2   3    4          13. Direct a