Explain why a charged body loses its charge if we touch it with our hand.

Our body is an electrical conductor. If we touch a charged body with our hand, the charges are conducted through our bodies to the earth.

  • When electric charges are transferred to earth directly with minimum resistance, an instantaneous discharge of the charged body occurs.
  • This phenomenon is called earthing.
  • Therefore, if we touch it with our hand, the charged body loses its charge due to earthing.

Related Questions

  1. Give two examples of drift velocity.
  2. Can rubbing cause static electricity?
  3. Define the drift velocity of electrons in a conductor?
  4. Explain What Happens When Amber is Rubbed with Wool or Silk.
  5. What is the major difference between static electricity and current electricity?

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CBSE CLASS XII Related Questions

  • 1.
    Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

      • attract with a force \( \frac{F}{2} \)
      • repel with a force \( \frac{F}{2} \)
      • repel with a force \( F \)
      • attract with a force \( F \)

    • 2.
      The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

        • \( \frac{q}{4 \pi \epsilon_0 l^2} \) pointing along MA
        • \( \frac{q}{\pi \epsilon_0 l^2} \) pointing along AM
        • \( \frac{q}{2 \pi \epsilon_0 l^2} \) pointing along AM
        • Zero

      • 3.
        A square loop of side 0.50 m is placed in a uniform magnetic field of 0.4 T perpendicular to the plane of the loop. The loop is rotated through an angle of 60° in 0.2 s. The value of emf induced in the loop will be:

          • 5 V
          • 3.5 V
          • 2.5 V
          • Zero V

        • 4.
          Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

            • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
            • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
            • Assertion (A) is true, but Reason (R) is false.
            • Both Assertion (A) and Reason (R) are false.

          • 5.
            Two parallel plate capacitors X and Y are connected in series to a 6 V battery. They have the same plate area and same plate separation but capacitor X has air between its plates, whereas capacitor Y contains a material of dielectric constant 4. Calculate the capacitances of X and Y, if the equivalent capacitance of the combination of X and Y is \( 4 \, \mu\text{F} \). Calculate the potential difference across the plates of X and Y.


              • 6.
                Photoemission of electrons occurs from a metal (\( \phi_0 = 1.96 \, \text{eV} \)) when light of frequency \( 6.4 \times 10^{14} \, \text{Hz} \) is incident on it. Calculate: Energy of a photon in the incident light, The maximum kinetic energy of the emitted electrons, and The stopping potential.

                  CBSE CLASS XII Previous Year Papers

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