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Three identical bar magnets are rivetted together at centre in the same plane as shown in Fig. This system is placed at rest in a slowly varying magnetic field. It is found that the system of magnets does not show any motion. The north-south poles of one magnet is shown in the Fig. Determine the poles of the remaining

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

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Verify the Ampere’s law for magnetic field of a point dipole of dipole moment` m = mhatk` . Take C as the closed curve running clockwise along the z-axis from z = a > 0 to z =

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

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Verify the Ampere’s law for magnetic field of a point dipole of dipole moment` m = mhatk` . Take C as the closed curve running clockwise along along the quarter circle of radius R and centre at the origin, in the first quadrant of x-z

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

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Verify the Ampere’s law for magnetic field of a point dipole of dipole moment` m = mhatk` . Take C as the closed curve running clockwise along along the x-axis from x = R to x =

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

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Verify the Ampere’s law for magnetic field of a point dipole of dipole moment` m = mhatk` . Take C as the closed curve running clockwise along along the quarter circle of radius a and centre at the origin in the first quadrant of x-z

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

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The gyro-magnetic ratio of an electron in an H-atom, according to Bohr model,

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An electron enters with a velocity v = v0i into a cubical region (faces parallel to coordinate planes) in which there are uniform electric and magnetic fields. The orbit of the electron is found to spiral down inside the cube in plane parallel to the x-y plane. Suggest a configuration of fields E and B that can lead to

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

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A 100 turn rectangular coil ABCD (in XY plane) is hung from one arm of a balance (Fig). A mass 500g is added to the other arm to balance the weight of the coil. A current 4.9 A passes through the coil and a constant magnetic field of 0.2 T acting inward (in xz plane) is switched on such that only arm CD of length 1 cm lies in the field. How much additional mass ‘m’ must be added to regain the

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

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Consider a circular current-carrying loop of radius R in the x-y plane with centre at origin. Consider the line intergral ` ℑ (L) = |∫_(-L)^L B dl| ` taken along z-axis. Use an appropriate Amperian loop to show that ` ℑ ∞ = μ_0I` , where I

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

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Two straight long conductors AOB and COD are perpendicular to each other and carry currents I1 and I2 . The magnitude of the mag. field at a point 'P' at a distance 'a' from the point 'O' in a direction perpendicular to the plane ABCD

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

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A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular Loop of n turns. The magnetic field at the centre of the coil for same current will

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

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The mag. field due to a current carrying circular Loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is `54mu T` what will be its value at the centre of the

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A, proton, a deuteron and `alpha`- an particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If `r_ p` , `r_d` and denote respectively the radii of trajectories of these particles,

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A current I, carrying wire AB is placed near an another long wire CD carrying current `I_2` As shown in Fig. If free to move, wire AB will

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An electric dipole is placed in an uniform electric field with the dipole axis making an angle `theta` with the direction of the electric field. The orientation of the dipole for stable equilibrium

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Assertion: When charges are shared between any two bodies, then no charge is really lost but some loss of energy does occur. Reason: Some energy disappears in the form of heat, sparking,

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Electric Dipole An electric dipole is a pair of point charges with equal magnitude and opposite in sign separated by a very small distance. The mid-point of locations of `-q and q` is called the centre of the dipole. The strength of an electric dipole is measured by a vector quantity known as electric dipole moment `(p)` which is the product of the charge `(q)` and separation between the charges `(2l)`.In most molecules, the centres of positive charges and of negative charges lie at the same place, hence their dipole moment is zero. `e.g. CO_2, CH_4`. However, they develop a

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

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The potential energy of a charged parallel plate capacitor is `U_0`. If a slab of dielectric constant `K` is inserted between the plates, then new potential energy will

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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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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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