Recent questions tagged chapter2

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Electrostatic potential energy is stored when a dipole is placed in the electric field. The energy is maximum at .........

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

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

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Choose the incorrect statement. Equipotential

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The electrostatic potential on the surface of a charged conducting sphere is `100V`. Two statements are made in this regard `S_1` at any point inside the sphere, electric intensity is zero. `S_2` at any point inside the sphere, the electrostatic potential is `100V`. Which of the following is a correct

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

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Match the Column I (potential) with Column II (value) for electric potential at different points `P_1, P_2, P_3 and P_4` as shown in the figure with respect to an electric dipole.Each points `P_1, P_2, P_3 and P_4` are equal distance r from mid-point `O` of dipole. Column I Column II A. `V_1` p. 0 B. `V_2` q. `p/(4sqrt2pi epsilon_0r^2)` C. `V_3` r. `(-p)/(4piepsilon_0r^2)` D. `V_4` s. `p/(4pi epsilon_0r^2)`

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

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A parallel plate capacitor is charged by a battery which is then disconnected. A dielectric slab is then inserted to fill the space between the plates. Match the changes that could occur with Column II. Column I Column II A. Charge on the capacitor plates p. Decrease by a factor of K B. Intensity of electric field q. Increase by a factor of K C. Energy stored r. Remains same D. Capacitance s. None

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

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Match the Column I (energy of capacitor) with Column II (value) and select the correct answer from the codes given below. A capacitor `C_1` of capacitance C is charged to a potential difference `V_0`. The terminals of the charged capacitor are then connected to an uncharged capacitor `C_2` of capacitance C/2. Column I Column II A. Final energy of capacitor `C_1` p.`-(1'/'6) CV_0^2` B. Final energy of capacitor `C_2` q.`(1'/'6) CV_0^2` C. Final energy of the system r. `(1'/'3) CV_0^2` D. Change in energy on joining the

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

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Assertion: Due to two point charges, electrical field and electric potential cannot be zero at same point simultaneously. Reason: Field is a vector quantity and potential a scalar

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

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Assertion: An electron moves from a region of lower potential to a region of higher potential. Reason: An electron has a negative

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Assertion: Five charges `+q` each are placed at Five vertices of a regular pentagon. A sixth charge `-Q`, is placed at the centre of pentagon, then net electrostatic force on `-Q`, is zero. Reason: Net electrostatic potential at the centre is

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

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Assertion: Electric field is always normal to equipotential surfaces and along the direction of decreasing order of potential. Reason: Negative gradient of electric potential is electric

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

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Assertion: No work is done in moving a charge along equatorial line. Reason: The electric potential is everywhere zero on the equatorial line of a

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Assertion: The expression of potential energy `U=1/(4piepsilon_0)(q_1q_2)/(r_(12))` is unaltered whatever way the charges are brought to the specified locations. Reason: Path-independence of work for electrostatic

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

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Assertion: When two positive point charges move away from each other, then their electrostatic potential energy decreases. Reason: Change in potential energy between two points is equal to the work done by electrostatic

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

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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

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

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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

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

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Assertion: Polar molecules do not have permanent dipole moment. Reason: In polar molecules, the centre of positive and negative charges coincides even when there is no external

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

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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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Assertion: Capacity of a parallel plate capacitor increases when distance between the plates is increased. Reason: Capacitance of a capacitor is directly proportional to distance between

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

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Assertion: If the distance between parallel plates of a capacitor is halved and dielectric constant is made three times, then the capacitance becomes 6 times. Reason: Capacity of the capacitor depends upon the nature of the material between the

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

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