Physics Homework Solutions

Magnetic Field and flux.

Q1) Find the total flux linkage of the coil shown on the attachment if each flux line represents 2 x 10^ -7 Wb. Q2) What is the equivalent flux linking all of the turns? (See attached file for full problem description)

Static Magnetic Field

If the current in the loop of the attachment were halved, the total flux threading the loop would.... 1) Halve 2) Be reduced to 1/4 of the previous value 3) Decrease to 3/4 of its original value 4) Decrease by more than 1/2 but greater than 1/4 its previous value.

Voltage due to Charge Configuration

See attached Word or PDF document (both files are identical) for problem. Thanks for your help!

2 Electromagnetic Questions

Question: For an accelerating voltage of 900 V calculate the time taken for an electron to reach the anode after being accelerated from rest (u=0) at the cathode of a CRT. Anode -cathode separation is 1cm? Question: A wire carrying a current of 100 A due West in Australia is suspended between two towers 50 m apart. The lines ...continues

Electromagnetic Question

Question: A wire carrying a current of 100 A due west in the southern hemisphere (Australia) is suspended between two towers 50 metres apart. The lines of force of the earth's magnetic field enter the ground there in a northerly direction at a 45 degree angle; the magnitude of the field is 5 mulitplied by 10 -5 T. Find the magni ...continues

Electromagnetic Induction: Induced EMF and current.

Two parallel loops of wire having the same common axis. the smaller loop of (raduis r ) and is above the larger loop (raduis R) by a distance X>>R. the magnetic field due to the counterclockwise current i in the larger loop is nearly uniform throughout the smaller loop. suppose that x is increasing at a constant rate dx/dt = ...continues

Induction and Energy Transfer

A metal rod is forced to move constant velocity V along two parallel metal rails, connected with a strip of metal at one end. A magnetic field of magnitude B = .350T points out of the page. a) if the rails are separated by a 25.0 cm and the speed of the rod is 55.0 cm/s, what emf is generated? b) if the rod has a resista ...continues

Mutual induction

Two solenoids are part of a spark plug coil of an automobile. When the current in one solenoid falls from 6.0A to zero in 2.5ms, an emf of 30KV is induced in the other solenoid. What is the mutual inductance M of the solenoids?

Electrons

Please answer all questions with full explanations thankyou In an electron microscope electrons are accelerated to a voltage of 15kV using an 'electron gun'. 1) If the cathode and anode are 0.4cm apart calculate the electric field 2) What is the force on an electron in this field? 3) What is the acceleration of an el ...continues

Motion of a charge particle in Magnetic and electric field.

A positive ion with charge 4.8 x 10(-19) C is traveling at a speed of 3 x 10(7) ms(-1) above the earth's atmosphere from East to West along the equator. The earth's magnetic field runs North-South. 1) Draw a sketch showing clearly the direction of motion of the charge, the lines of magnetic force and the direction of the magn ...continues

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