Space station

Imagine a space station module shaped like a cylinder 30m long and 5m in diameter orbiting close to the earth above the earth's equater. What would be the maximum potential difference that could develop between the ends of the module.( I know that potential difference=EL but how do I find E? It is also equal to VB/C or v*magnet ...continues

moving bar

How fast do we have to move the bar to put a voltage difference of 3.0 V across the bulb?

generator

Consider a generator constructed as shown in figure E8.14. The loop in this generator rotates at an angular rate of w. The slip rings in this design ensure that the same leg of the rotating loop is always connected to the same output terminal. Show that the potential difference between the output terminals is given by E= 'E0 cos ...continues

Flux

We know that the magnitude of the electric field at a point a distance r from an infinite straight wire with a uniformly distributed positive charge E =2k/r, where  is the charge per unit length on the wire. Imagine that we surround a portion of such a wire with a closed surface shaped like a cylindrical can. W ...continues

Magnetic Field - In a circular region of radius r1 there is a uniform magnetic field coming out of the page and decreasing at a constant rate dB/dt = -K. A circular wire loop of radius r2 lies entirely outside the magnetic field region. In what direction does the conventional current I flow in the loop? What is the magnitude of I? Draw the induced (non-Coulomb) electric field in the loop. What is its magnitude?

In a circular region of radius r1 there is a uniform magnetic field coming out of the page and decreasing at a constant rate dB/dt = -K. A circular wire loop of radius r2 lies entirely outside the magnetic field region. In what direction does the conventional current I flow in the loop? What is the magnitude of I? Draw the induc ...continues

Flux #2

Consider a body of flowing water, such as a river. We can describe the flow of river water mathematically by a vector field that describes the water velocity v at ever a) First, imagine that the surface is perpendicular to the water flow in its vicinity, so that the flux of water through the surface is dv= vɨ ...continues

Physics

a) Give a counterexample to show that the following statement is false: "When the magnetic field through a loop changes, currents run in the loop in such a way as to make a new magnetic field in the opposite direction to the original one." (b) Two metal rings lie side by side on a table. Current in the left ring runs clockwis ...continues

Magnetic Field - Excel Graph

Consider a flat circular current loop of radius R carrying current I. Chose the X axis to be along the axis of the loop, with the origin at the center of the loop. In MS Excel - Graph the ratio of the magnitude of the the magnetic field at coordinate x to that of the origin, for x = 0 to x=5R.

Determining beat frequency from a ultrasound wave

Ultrasound reflected from an oncoming bloodstream that is moving at a 30 cm/s is mixed with the original frequency of 2.5 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat frequency = in Hz

Magnetic Field/Induction, A circular coil with radius R = 8.0 cm has 15 turns of wire. The magnetic induction field in the center of the loop is 6.0 X 10-4 T. Find current in the loop.

A circular coil with radius R = 8.0 cm has 15 turns of wire. The magnetic induction field in the center of the loop is 6.0 X 10-4 T. Find current in the loop.