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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 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: ‘A system displaying a hysteresis loop such as a ferromagnet, is a device for storing memory?’ Explain the meaning of this

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Explain quantitatively the order of magnitude difference between the diamagnetic susceptibility of N2 (~5 × 10–9) (at STP) and Cu

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From molecular view point, discuss the temperature dependence of susceptibility for diamagnetism, paramagnetism and

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Suppose we want to verify the analogy between electrostatic and magnetostatic by an explicit experiment. Consider the motion of magnetic dipole m in a magnetic field B. Write down a set of conditions on E, B, p, m so that the two motions are verified to be identical. (Assume

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

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Assume the dipole model for earth’s magnetic field B which is given by BV = vertical component of magnetic field = `μ_0 /(4π) (2mcosθ )/r^3 ` BH = Horizontal component of magnetic field = `μ_0 /(4π) (sinθm)/r^3 ` θ = 90° – lattitude as measured from magnetic equator. Find loci of points for which

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

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An electron is projected with uniform velocity along the axis of a current carrying long solenoid. Which of the following is

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

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As shown in Fig. there are two semicircles of radii `r_1 = 12 cm` and `r_2 = 10 cm` in which 4 Amp current is flowing The mag. field at the centre 'O' is

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

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Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment

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The rectangular coil having 100 turns is turned in a uniform mag. field of `0.05/sqrt2hatj` as shown in the fig. The torque acting on the Loop is

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

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A conducting rod of length ? [cross-section is shown] and mass m is moving down on a smooth inclined plane of inclination `theta` with constant speed `v` . A vertically upward mag. field `vecB` exists in upward direction. The magnitude of mag. field `vecB` is

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

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The magnetic field due to a short magnet at a point on its axis at a distance x cm from the middle point of the magnet is 200 gauss. The magnetic field at a point on the neutral axis at a distance x cm from the middle of the magnet is .................

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

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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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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 energy required to charge a parallel plate condenser of plate separation `d` and plate area of cross-section A such that the uniform electric field between the plates `E`

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

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Two identical capacitors, have the same capacitance C. One of them is charged to potential `V_1` and the other to `V_2`. Likely charged plates are then connected. Then the decrease in energy of the combined system

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Assertion: No work is done in moving a charge along equatorial line. Reason: The electric potential is everywhere zero on the equatorial line of a

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Assertion: In the absence of an external electric Field, the dipole moment per unit volume of a polar dielectric is zero. Reason: The dipoles of a polar dielectric are randomly

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

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