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Electric potential at any point is `V = –5x + 3y + sqrt15z` , then the magnitude of the electric field is .....

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

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A small conducting sphere of radius r is lying concentrically inside a bigger hollow conducting sphere of radius R. The bigger and smaller sphere are charged with Q and q (Q > q) and are insulated from each other. The potential difference between the sphers will be

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

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The principle of ‘parallax’ in section 2.3.1 is used in the determination of distances of very distant stars. The baseline AB is the line joining the Earth’s two locations six months apart in its orbit around the Sun. That is, the baseline is about the diameter of the Earth’s orbit `≈ 3 xx 10^(11)`m. However, even the nearest stars are so distant that with such a long baseline, they show parallax only of the order of 1” (second) of arc or so. A parsec is a convenient unit of length on the astronomical scale. It is the distance of an

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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On the basis of dimensions, decide which of the following relations for the displacement of a particle undergoing simple harmonic motion is not

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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In general in an alternating current

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

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An inductor L and capacitor C are connected in the circuit as shown in fig. The frequency of the power supply is equal to the resonant frequency of the circuit. Which ammeter will read zero

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

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A capacitor of 50 pF is connected to an a.c. source of frequency 1kHz Calculate its

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In LCR circuit with an AC source `R = 300Omega, C = 20 muF, L = 1.0 H, E_('rms')=50V and f = 50'/'piHz`. Find RMS current in the

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

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Calculate impedance of the given circuit

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What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30º with the direction of a uniform magnetic field of 0.15

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

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Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire

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

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The earth’s magnetic field at the equator is approximately 0.4 G. Estimate the earth’s dipole

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

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Answer the following questions regarding earth’s magnetism: If you made a map of magnetic field lines at Melbourne in Australia, would the lines seem to go into the ground or come out of the

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

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Answer the following questions regarding earth’s magnetism: The earth’s field, it is claimed, roughly approximates the field due to a dipole of magnetic moment 8 × 1022 J T–1 located at its centre. Check the order of magnitude of this number in some

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

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Answer the following questions regarding earth’s magnetism: Geologists claim that besides the main magnetic N-S poles, there are several local poles on the earth’s surface oriented in different directions. How is such a thing possible at

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

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Answer the following questions: The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism.

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

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Answer the following questions: The charged currents in the outer conducting regions of the earth’s core are thought to be responsible for earth’s magnetism. What might be the ‘battery’ (i.e., the source of energy) to sustain these

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

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Answer the following questions: The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this

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

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

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

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A magnetic dipole is under the influence of two magnetic fields. The angle between the field directions is 60°, and one of the fields has a magnitude of 1.2 × 10–2 T. If the dipole comes to stable equilibrium at an angle of 15° with this field, what is the magnitude of the other

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

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