Give reason : ''Small and light pieces of paper are attracted by comb run through dry hair.''
Give reason : ''Small and light pieces of paper are attracted by comb run through dry hair.''
A comb run through dry hair acquires charge through friction but the paper is not charged. The charged comb 'polarizes' the piece of paper, induces a net dipole moment in the direction of field. Further, the electric field due to the comb is not uniform. In this situation it is easily seen that the paper should move in the direction of the comb.
Similar Questions
Select the correct statement : (Only force on a particle is due to electric field)
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Time period of a block suspended from the upper plate of a parallel plate capacitor by a spring of stiffness $k$ is $T$. When block is uncharged. If a charge $q$ is given to the block them, the new time period of oscillation will be
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Explain electric field and also electric field by point charge.
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What is the magnitude of a point charge which produces an electric field of $2\, N/coulomb$ at a distance of $60\, cm$ $(1/4\pi {\varepsilon _0} = 9 \times {10^9}\,N - {m^2}/{C^2})$
The unit of intensity of electric field is
The unit of intensity of electric field is