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Consider three charges, one of magnitude +2Q and other two have magnitude -Q. They are
placed in a constellation as depicted in the figure below. Find out the electric intensity at some
spherical point P(r, theta,
A straight wire of mass 300g and length 25m and current of 35A.It is suspended in midair by a uniform horizontal magnetic field B.What is the magnitude of the magnetic field?
Which of the following factors does NOT affect the resistance of a metallic conductor at
constant temperature?
A. Type of the conductor.
B. Length of the conductor.
C. Surface area of the conductor.
D. Cross-sectional area of the conductor.

A soccer goal, found in a city park, is made of tubing that supports an odd shaped hanging net behind the goal, but has a rectangular opening in front. The height of the opening is 2.5 m and the width is 3.2 m. If a uniform E-field, with a magnitude of 0.1 N/C, passes through the goal from the front to the back, entering at 90º to the plane of the goal opening, Calculate the flux through the net? Also, calculate the flux through the net if the E-field enters the goal at a 60° angle to the plane of the front of the goal. In both cases, assume that there is no charge found inside the goal itself. 



A negatively charged object is brought close to an electroscope but does not touch. After a while you remove the charged object. What was the charge on the gold leaves while the object was close to the electroscope and what was the charge after the object was removed?


What initial observation in 1820 did Orsted make about the relationship between electricity and magnetism
A proton with the rest mass of 1.67 x 10 kg is initially moving at 0.90c in the +z-direction, relative to the reference frame of a physics laboratory. Then a constant force

F = (-3.0 x 10 12 N) i+ (5.0 × 10- N)j

is applied to the proton. What is the angle between the applied force and the resulting acceleration of the proton?
The plates of parallel capacitor 5.0×10-³m apart maintained at a potential difference of 5.0×10^4. Calculate the magnitude of the a. Electric field intensity between the plates b. Force of the electron c. Acceleration if the electron ( electron charge =1.60×10^-19c)
If a wire of length 4 meter is carrying a current of 2 Ampere,calculate the magnetic field strength at a distance of 3 meter from the wire
9. Suppose that the Sun has a positive electric charge and each of the planets a negative
electric charge, and suppose that there is no gravitational force. In what way will the
motions of the planets predicted by this "electric" model of the Solar System differ from
the observed motions?
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