Can rubbing cause static electricity?

Friction or the rubbing of objects causes static electricity. This is caused due to the movement of the electrons from one object to another. The object that gives electrons becomes positively charged and the object that gains electrons becomes negatively charged.


Related Questions

  1. Where do we use static electricity in everyday life?
  2. What Are Two Kinds Of Electricity?
  3. What is balance point in potentiometer?
  4. Why High Resistance Is Used In Potentiometer?
  5. How is potential gradient measured?

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CBSE CLASS XII Related Questions

  • 1.
    The resistance of a metal wire at \( 20^\circ \text{C} \) is \( 1.05 \, \Omega \) and at \( 100^\circ \text{C} \) is \( 1.38 \, \Omega \). Determine the temperature coefficient of resistivity of this metal.


      • 2.
        Read the following paragraph and answer the questions that follow.
        In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.


          • 3.
            This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?


              • 4.
                Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.


                  • 5.
                    Write two advantages of reflecting telescope over refracting telescope.


                      • 6.
                        Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

                          • The total charge of the two spheres is conserved.
                          • Both spheres attain the same potential.
                          • The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
                          • The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$
                        CBSE CLASS XII Previous Year Papers

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