Field Theory Answers

A current 5A passes through a straight wire in a uniform magnitude field of a flux density 2.0 T. Calculate the force per unit length exerted on the wire when it is inclined at 30° to the field.

A long straight wire carries a current of 1.5 A. an electron travels with a speed of 5 x 106 cm/s parallel to the wire 10 cm from it and in the same direction as the current. What force does the magnetic field of the current exert on the moving electron.

A charged oil drop is prevented from falling under gravity by a vertical electric field

between two horizontal metal plates charged to a potential difference 6920 V, the

distance between the plates being 1.3 cm. When the field is cut off the drop falls in air

with a uniform velocity of 1.9 × 10−4

Two long parallel wires are 10 cm apart and carry currents of 6 A and 4 A. what is the field B at 4 A carrying wire due to 6 A wire.

A stone is thrown the top of building upward at an angle of 30 to the horizontal with an initial speed of 20 m/s , if the height of the building is 45 m. How long does the stone to reach the ground? What is the speed of the stone just before it strikes ground?

A ball is thrown upward at 16m/s. How long does it take the ball to reach its maximum height?

An object slides down an inclined plane from an initial height of 30 meters.Its velocity at the foot of the plane is 20m/s.

The percentage of its initial potential energy which is deposited as heat is?

The expression of the magnetic field associated with an electromagnetic wave in 'vacuum is given by

B = (100D) ysin(2 x103t +k

Determine the wave number, frequency and the direction of propagation of the wave, " aand the magnitude and direction of the electric field associated with it.

Inner radius is R and outer radius 3R, charge density is p, negatively charged, long cylinder. This cylinder is immersed in a dielectric constant k= 80 (clean water), then what is the electric field strength of the cylinder axes from distance 5R. Write E5R wtih R,p and ε0.

Obtain the directional derivative for a scaler field (x,y,z) = 3x^2-y^3z^2 at the point ( 1, -2,-1)in the direction of i^+ j^+ k^......