2. The field B = -2a, +3a, +4a₂ T is present in free space. Find the vector force exerted on a wire carrying 12 A in as the direction, given 4(1, 1, 1) and B(2, 1, 1). (Answer: F=-48a, +36a, N)

Q: (a) Explain briefly what is fringing effect and leakage flux. (b) A ferromagnetic core is shown in…

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Q: Biot-Savart law expresses:

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Q: The spring force is proportional to the displacement.

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Q: At low slip, the relation between the torque and the slip is:

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Gradient of a Scalar Field

Consider a room or a place where the temperature is denoted by a scalar field T, such that at each point (x, y, z), the temperature is given as T(x, y, z). It is independent of time, in which the temperature rises most quickly. The gradient of T will show the direction at that point by moving away from (x, y, z). How far will the rise in temperature in that direction be determined by the gradient magnitude? Consider a surface that has a height above sea level at point (x, y) which is given by H(x, y). At that point, pointing in the direction of the steepest slope or grade is the gradient of H. The magnitude of the gradient of the vector gives the steepness of the slope at that point. How a scalar field changes in another direction can be measured by the gradient by taking a dot product rather than just the direction of the greatest change?