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Question1
A current of 1A is injected into the earth at the bottom of a borehole. Derive an expression for the Voltage at distance R from the injection point. Assume that the earth has a uniform linear conductivity and that the borehole diameter is negligible (Use J = σE).
Question2
A bicycle wheel is rotating with an angular velocity of 3.1 rev/s. The brakes coefficient of kinetic friction between the wheel and the brakes is 0.87, find out the number of revolutions the wheel makes in coming to rest. The moment of inertia of the wheel is 0.24 kg*m and its radius is 0.32 m.
Question3
Consider a crate at rest on a factory ?oor. As a pair of workmen start lifting it, does the support force on the crate provided by the ?oor increase, decrease, or remain unchanged? What happens to support force on the workmen's feet?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
What is the maximum displacement of the bridge deck?
What is the magnitude of the current in the wire as a function of time?
Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
Illustrate the cause of the components accelerating from rest down the conveyor.
Calculate the dc voltage applied to the circuit.
Quadrupole moments in the shell model
Determine the tension in each string
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
Evaluate maximum altitude?
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