Field Theory Answers

Two unequal charge q1 and q2 placed at some separation . Consider middle point of line joining the changes four directions are drawn (up , down, right, left) which is correct and more than one can be true.
a) left, right are equivalent directions .
b)up, down are equivalent directions.
c) up ,down,right ,left are equivalent directions.
d) none of two directions are equivalent

Two unequal charge q1 and q2 placed at some separation . Consider middle point of line joining the changes four directions are drawn (up , down, right, left) which is correct and more than one can be true.
a) left, right are equivalent directions .
b)up, down are equivalent directions.
c) up ,down,right ,left are equivalent directions.
d) none of two directions are equivalent

The electric held in a region is given by E =20i +30j in certain units. As one goes a small distance dl in the direction of
n vector =30i-20j .The potential will

(a) increase

(b) decrease

(c) remain constant

(d) change sign

Choose the correct option .More than one option could be correct

The diagram shows two positively charged spheres, one with three times the charge of the other. The spheres are 16 cm apart, and the force between them is 0.28 N. What are the charges on the more charged sphere?
(Hint use coulombs law where K= 8.9×109 kg⋅m3⋅s−2⋅C−2.)

what would you do if you are caught on a thunderstorm

A space shuttle of total mass 15000kg is orbiting the earth at a height 5.0x 10^5m above the earth's surface. Assuming that the radius of the earth is 6.4 x 10^ 6m and the gravitational pull of the earth at the surface of the earth is approximately 10m/s^2 . Calculate
I . Gravitational pull of the earth on the space shuttle at that height
ii. weight of the space shuttle at that height
iii. loss of weight of the space shuttle because of its height above the ground

8.4 cm in SI units

A sphere with radius R is uniformly charged with a total charge of Q. The magnitude of the electric field at a distance R/2 from the sphere's centre is:

kindly explain the answer.
Block A on the left has mass 1.00kg. Block B on the right has mass 3.00kg.The blocks are forced together, compressing the spring.Then the system is released from rest on a level,frictionless surface. After the blocks are released, the kinetic energy (KE) of block A is?