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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

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

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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

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

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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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Assertion: A charged capacitor is disconnected from a battery. Now, if its plate are separated, further the potential energy will fall. Reason: Energy stored in a capacitor is not equal to the work done in charging

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

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Assertion: When a capacitor is charged by a battery, half of the energy supplied by the battery is stored in the capacitor and rest half is lost. Reason: If resistance in the circuit is zero, then there will be no loss of

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

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Equipotential SurfaceIn physics, the region in space where every point in it is at the same potential, is called equipotential or isopotential. An equipotential region of a scalar potential in three-dimensional space is often an equipotential surface, but it can also be a three-dimensional region in space. The gradient of the scalar potential is everywhere perpendicular to the equipotential surface, and zero inside a three-dimensional equipotential region. In case of electrical conductors, if a and b are any two points within or at the surface of a given conductor, and given there is no flow of charge being exchanged between

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

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Equipotential SurfaceIn physics, the region in space where every point in it is at the same potential, is called equipotential or isopotential. An equipotential region of a scalar potential in three-dimensional space is often an equipotential surface, but it can also be a three-dimensional region in space. The gradient of the scalar potential is everywhere perpendicular to the equipotential surface, and zero inside a three-dimensional equipotential region. In case of electrical conductors, if a and b are any two points within or at the surface of a given conductor, and given there is no flow of charge being exchanged between

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

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Equipotential SurfaceIn physics, the region in space where every point in it is at the same potential, is called equipotential or isopotential. An equipotential region of a scalar potential in three-dimensional space is often an equipotential surface, but it can also be a three-dimensional region in space. The gradient of the scalar potential is everywhere perpendicular to the equipotential surface, and zero inside a three-dimensional equipotential region. In case of electrical conductors, if a and b are any two points within or at the surface of a given conductor, and given there is no flow of charge being exchanged between

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

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