Electric Charges and Fields

Subject matter experts of JagranJosh have developed chapter wise practice questions of Class 12th as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Electric Charges and Fields” of Physics.

  • Q1.Figure shows electric field lines in which an electric dipole p is placed as shown. Which of the following statements is correct?

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  • Q2.The Electric field at a point is

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  • Q3.If there were only one type of charge in the universe, then
    (i) ∫ E.dS≠ 0 on any surface.
    (ii) ∫ E.dS= 0 if the charge is outside the surface.
    (iii)∫ E.dS could not be defined.
    (iv) E.dS = q ε 0 ,if charges of magnitude q were inside the surface.

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  • Q4.Consider a region inside which there are various types of charges but the total charge is zero. At points outside the region

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  • Q5.Refer to the arrangement of charges in Fig. and a Gaussian surface of radius R with Q at the centre. Then

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  • Q6.A positive charge Q is uniformly distributed along a circular ring of radius R. A small test charge q is placed at the centre of the ring (Fig.). Then

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  • Q7.A metallic spherical shell has an inner radius R1 and outer radius R2. A charge Q is placed at the centre of the spherical cavity. What will be surface charge density on the inner surface?

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