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The force of interaction between two charges `q_1 = 6 muC and q_2= 2 muC` is `12 N`. If charge `q =-2 muC` is added to each of the charges, then the new force of interaction

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Two point charges placed at a certain distance `r` in air exert a force `F` on each other. Then, the distance `r'` at which these charges will exert the same force in a medium of dielectric constant `K` is given

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What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial

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The dipole moment of a dipole in an uniform external field `E` is p, then the torque `(tau)` acting on the dipole

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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

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Capacitor A device that stores electrical energy in an electric field is known as to be capacitor. It is a passive electronic component with two terminals. It basically consists of two conductors separated by a non-conductive region. This non-conductive region can either be a vacuum or an electrical insulator material known as a dielectric from Coulomb’s law a charge on one conductor will exert a force on the charge carriers within the other conductor, attracting opposite polarity charge and repelling like polarity charges, thus an opposite polarity charge will be induced on the surface of the other conductor. The conductors

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

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Capacitor A device that stores electrical energy in an electric field is known as to be capacitor. It is a passive electronic component with two terminals. It basically consists of two conductors separated by a non-conductive region. This non-conductive region can either be a vacuum or an electrical insulator material known as a dielectric from Coulomb’s law a charge on one conductor will exert a force on the charge carriers within the other conductor, attracting opposite polarity charge and repelling like polarity charges, thus an opposite polarity charge will be induced on the surface of the other conductor. The conductors

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

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A battery of emf E has an internal resistance r. A variable resistance R is connected to the terminals of the battery. A current `i` is drawn from the battery. V is the terminal potential difference. If R alone is gradually reduced to zero, which of the following best describes `i and

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

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The potential difference `(V_A - V_B)` between the points A and B in the given figure

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In a Wheatstone bridge circuit, `P=7 Omega, Q= 8 Omega, R = 12 Omega and S = 7 Omega`. Find the additional resistance to be used in series with `S` , so that the bridge is

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

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A circular coil of wire consisting of 100 turns, each of radius `8.0 cm` carries a current of `0.40 A`. What is the magnitude of the magnetic field B at the centre of the

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A current of 10A is flowing from east to west in a long straight wire kept on a horizontal table. The magnetic field developed at a distance of 10 cm due north on the table

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The variation of magnetic field with distance d from centre of current carrying solenoid is best represented

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Moving Coil GalvanometerMoving coil galvanometer operates on Permanent Magnet Moving Coil (PMMC) mechanism and was designed by the scientist D’arsonval.Moving coil galvanometers are of two types (i) Suspended coil (ii) Pivoted coil type or tangent galvanometer.Its working is based on the fact that when a current carrying coil is placed in a magnetic field, it experiences a torque. This torque tends to rotate the coil about its axis of suspension in such a way that the m agnetic flux passing through the coil is maximum .To make the field radial in a moving coil

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

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The angle of dip at a certain place on the earth is 60° and the magnitude of the earth’s horizontal component of magnetic field is 0.26 G. The magnetic field at the place on the earth

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

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Earth’s Magnetic FieldThe magnetic field lines of the earth resemble that of a hypothetical magnetic dipole located at the centre of the earth. The axis of the dipole is presently tilted by approximately 11.3° with respect to the axis of rotation of the earth.The pole near the geographic north pole of the earth is called the north magnetic pole and the pole near the geographic south pole is called south magnetic pole.At a place, angle of dip is 30°. If horizontal component of earth’s magnetic field is `H_e`` then the total intensity of magnetic field will

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

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The core of a transformer is laminated to

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

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When an AC voltage is applied to an L-C-R circuit,

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

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The core of a transformer is laminated

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

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In an L-C-R circuit, capacitance is changed from C to 2C. For the resonant frequency to remain unchanged, the inductance should be changed from `L` to

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

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