<span>let r be side of square
V (B) = k q2/r + k Q / sqrt[r^2 + r^2] = 0 given
q2/r + Q / r root2 = 0
q2 = - Q / root2
q2/Q = - 1/root2
q2/Q = - root2 /2 = - 0.707
q2 equals negative 0.707 times Q</span>
Answer:
62.601kJ
Explanation:
We have a force with a horizontal component given by the angle of 15°. So wue can take this component to calculate the total work done, that is,

Our values are,


,
Substituting in Work equation,



Hi, I didn’t understand too well your question, but I hope this helps!
Archimedes principle is based on the weight of the object to push the object upward. Law of floation is the priciple which tells us about the density of the object with the liquid in which it is placed.
By building dams and levees . Hope this helps
PART A)
If we increase the voltage supply in an electromagnet then it will increase the current that is flowing in it
So here due to increase in current there will be increase in the magnetic field due to that electromagnet
PART B)
Here in electric generator the current is produced by rotating a coil between two strong magnets.
So here mechanical energy of rotation of coil is converted into electromagnetic energy.
PART C)
Step up transformer convert the lower voltage input into higher voltage output
here number of turns of coil in output side or secondary number of coils is more than the number of coils in primary side or input side
PART D)
Force on a moving charge is given by

here we know that
q = 0.000600 C

B = 4.21 T
now from above equation we have


direction of force is given by right hand thumb rule
using that rule we got force downwards