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Explain: What kind of ferromagnetic material is used for coating magnetic tapes in a cassette player, or for building ‘memory stores’ in a modern

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Suppose we want to verify the analogy between electrostatic and magnetostatic by an explicit experiment. Consider the motion of electric dipole p in an electrostatic field E

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The direction of mag. field lines close to a straight conductor carrying current will be

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The variation of the intensity of magnetisation (I) with respect to the magnetising field (H) in a diamagnetic substance is described by the

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A small bar magnet of moment M is placed in a uniform field of H. If magnet makes an angle of `30^0` with field, the torque acting on the magnet

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In the diagram shown below

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A charged particle is free to move in an electric field. It will

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Find the correct diagram of electric lines of forces for negative

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Assertion: The gravitational force is the dominating force in the universe. Reason: The coulomb force is weaker than the gravitational

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In the Figure shown, the effective capacitance between the points A and B, if each has capacitance C,

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A capacitor is charged by a battery, the battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting

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Equipotential surface due to a point charge is

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A dielectric induces....... in an external electric field which decreases the net electric

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Assertion: Conductor having equal positive charge and volume, must also have same potential. Reason: Potential depends only on charge and volume of

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Assertion: In the absence of an external electric Field, the dipole moment per unit volume of a polar dielectric is zero. Reason: The dipoles of a polar dielectric are randomly

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Assertion: A capacitor can be given only a limited quantity of charge. Reason: Charge stored by a capacitor depends on the shape and size of the plates of capacitor and the surrounding

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Dielectrics Dielectrics are insulating (non-conducting) materials that can produce electric effect without conduction. Movement of free charges is not possible in a dielectric, so they behave differently.When a dielectric material is kept in an electric field, then the external field induces dipole moment. Due to which, net charges on the surface of the dielectric appears.Which of the following is/are the examples of non-polar

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If `2A` current is flowing in the shown circuit, then potential difference `(V_B - V_D)` in balanced condition

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A meter bridge is set up as shown in figure, to determine an unknown resistance `X` using a standard `10 Omega` resistor. The galvanometer shows null point when tapping key is at `52 cm` mark. The end-corrections are `1 cm and 2 cm` respectively for the ends A and B. The determined value of `X`

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Commercial Electrical EnergyAn electrical appliance uses a lot of electric energy when it is operated e.g., geysers heaters etc. The electrical energy consumed is dependent on the time for which a specific appliance of fixed power rating is used. However, the energy used in hour is denoted as `1 kWh=3.6 xx 10^6` joule. This is represented as 1 unit. Different electrical appliance have difference power consumption which is mentioned on the device clearly.Which of the following does not represent electrical

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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