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Consider the LCR circuit shown in Fig . Find the net current i and the phase of i. Show that ` I=Z/V` . Find the impedence Z for this

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The self inductance of a straight conductor

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A choke coil and a resistance are connected in series in an a.c circuit and a potential of 130 volt is applied to the circuit. If the potential across the resistance is 50 V. What would be the potential difference across the choke

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A bent rod `PQR (PQ = QR =l)` shown here is rotating about its end P with angular speed `omega` in a region of transverse magnetic field of strength

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Answer the following questions: A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions

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A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires.(i) What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero?(ii) What will be the total tension in the wires if the direction of current is reversed keeping the magnetic field same as before? (Ignore the mass of the wires.) g = 9.8 ms–2

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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.

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A short bar magnet has a magnetic moment of 0.48 J T –1. Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on the equatorial lines (normal bisector) of the

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Why is diamagnetism, in contrast, almost independent of

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Explain: Explain qualitatively on the basis of domain picture the irreversibility in the magnetisation curve of a

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A long straight horizontal cable carries a current of 2.5 A in the direction 10° south of west to 10° north of east. The magnetic meridian of the place happens to be 10° west of the geographic meridian. The earth’s magnetic field at the location is 0.33 G, and the angle of dip is zero. Locate the line of neutral points (ignore the thickness of the cable)? (At neutral points, magnetic field due to a current-carrying cable is equal and opposite to the horizontal component of earth’s magnetic

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

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A sample of paramagnetic salt contains 2.0 × 1024 atomic dipoles each of dipole moment 1.5 × 10–23 J T –1. The sample is placed under a homogeneous magnetic field of 0.64 T, and cooled to a temperature of 4.2 K. The degree of magnetic saturation achieved is equal to 15%. What is the total dipole moment of the sample for a magnetic field of 0.98 T and a temperature of 2.8 K? (Assume Curie’s

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Let the magnetic field on earth be modelled by that of a point magnetic dipole at the centre of earth. The angle of dip at a point on the geographical

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A rectangular conducting loop consists of two wires on two opposite sides of length l joined together by rods of length d. The wires are each of the same material but with cross-sections differing by a factor of 2. The thicker wire has a resistance R and the rods are of low resistance, which in turn are connected to a constant voltage source V0. The loop is placed in uniform a magnetic field B at 45° to its plane. Find τ, the torque exerted by the magnetic field on the loop about an axis through the centres of

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A current of a 1 Amp is passed through a straight wire of length 2 meter. The magnetic field at a point in air at a distance of 3 meters from either end of wire and lying on the axis of wire will

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When the current flowing in a circular coil is doubled and the number of turns of the coil in it is halved, the magnetic field at its centre will

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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,

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

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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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The forces existing between two parallel current carrying conductors is F. If the current in each conductor is doubled, then the value of force will

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The most appropriate magnetization `Mto` magnetising field H curve for a paramagnetic substance

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

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