What features of atomic structure determine whether an element is diamagnetic or paramagnetic? Explain.
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What features of atomic structure determine whether an element
is diamagnetic or paramagnetic? Explain.
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- Question 1: A) Dinesh studying rail guns has been suggested for launching projectiles into space without chemical rockets. A tabletop model rail gun (Figure 1.) consists of two long, parallel, horizontal rails, l= 6.80 cm apart, bridged by a bar of mass m= 8.00 g that is free to slide without friction. The rails and bar have low electric resistance, and the current is limited to a constant I = 42.0 A by a power supply that is far to the left of the figure, so it has no magnetic effect on the bar. Figure 1 shows the bar at rest at the midpoint of the rails at the moment the current is established. He wishes to find the speed with which the bar leaves the rails after being released from the midpoint of the rails (Hint: you need to draw the figure). (Mo = 4π × 10-¹T.) Jg x V₁ = = 0 m d Figure 1. (i) Find the magnitude of the magnetic field at a distance of 1.85 cm from a single long wire carrying a current of 2.40 A. (ii) For purposes of evaluating the magnetic field, model the rails as…How to solve this questionFor Diamagnetic leviation, does it matter whether the magnet’s N or S pole points upward? explain algebraically and through showing symmetry
- QUESTION 5 a) A magnetic circuit consists of a toroidal silicon sheet steel with relative permeability 4, of 150, and a small air gap. A current I flows through 200 turns of wire wrapped around the toroid. The magnetic flux of the circuit is 5 x 10-9 Wb. The total length of the circuit is 0.8 m, and the cross-sectional area of the toroid is10-*m². The length of the air gap is 0.07 m. Find i. The total reluctance and inductance of the circuit ii. Magnetomotive force and hence the current. Ho = 4n x 10-7 H/m b) Differentiate between faraday law of electromagnetic induction and Lenz law and discuss their practical importance c) Using stokes theorem, prove that the divergence of curl of a vector is zeroMagnetic Forces Problem 19: Suppose a 2.2 T field is applied across a 10-gauge copper wire (2.588 mm in diameter) carrying a 18 A current. What would the Hall voltage be, in microvolts, if the number density of free electrons in copper is 8.34 × 1028m-3.Two magnetic dipoles m1 and m2 (equal in magnitude) are oriented in three different ways. Which ways produce a dipole field at large distances? Briefly explain your reasoning.
- 2) A cross-sectional view of four long parallel conducting wires of length / and the directions of the currents are shown in the figure. Determine the magnitude and direction of the force exerted on the wire carrying current of It. 3a 312 3a 12Magnetic Forces Problem 19: Suppose a 2.25 T field is applied across a 10-gauge copper wire (2.588 mm in diameter) carrying a 17 A current. What would the Hall voltage be, in microvolts, if the number density of free electrons in copper is 8.34 × 1028m-3.