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An LC circuit contains a 20mH inductor and a `50muF` capacitor with an initial charge of 10mC. The resistance of the circuit is negligible. Let the instant the circuit is closed to be `t = 0.`At what time is the energy stored is completely

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

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The potential difference V and current I flowing through the AC circuit is given by `V=5 cos(omegat –pi/6)` volt `and I = 10sinomegat` ampere. The average power dissipated in the circuit

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

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What happens if a bar magnet is cut into two pieces: (a) transverse to its length, (b) along its

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

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

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

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

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In the magnetic meridian of a certain place, the horizontal component of the earth’s magnetic field is 0.26G and the dip angle is 60°. What is the magnetic field of the earth at this

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

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A bar magnet of magnetic moment 1.5 J T –1 lies aligned with the direction of a uniform magnetic field of 0.22 T.(i) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (a) normal to the field direction, (b) opposite to the field direction?(ii) What is the torque on the magnet in cases (a) and

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

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Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a

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A toroid of n turns, mean radius R and cross-sectional radius a carries current I. It is placed on a horizontal table taken as x-y plane. Its magnetic moment

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

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A long solenoid has 1000 turns per metre and carries a current of 1 A. It has a soft iron core of μr = 1000. The core is heated beyond the Curie temperature,

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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Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field B = `B_0

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In a cyclotron, a charged

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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The magnetic induction at a point P which is at a distance 4 cm from a long current carrying wire is `10^(-8 )` tesla. The field of induction at a distance 12 cm from the same current would be

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

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A conducting rod of 1 meter length and 1 kg mass is suspended by two vertical wires through its ends. An external magnetic field of 2 Tesla is applied normal to the rod. Now the current to be passed through the rod so as to make the tension in the wires zero is [take g = 10

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

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Circular loop of a wire and a long straight `I_C` , `I_E` respectively as shown in fig. Assuming that these are placed in the same plane. The mag. field will be zero at the centre of the Loop when separation H is

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

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

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A solenoid of 1.5 meter length and 4 cm diameter possesses 10 turn per cm. A current of 5 Amp is flowing through it. The magnetci induction at axis inside the solenoid

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

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