We are observing wasted heat in everyday life for example in Pakistan heavy generated are installed, during their supply of electricity an excessive amount of wasted heat is produced in its surrounding, similarly when we drive a vehicle a heat is available in the surrounding of engine of that vehicle, we can also see many more such examples of wastage of heat. This heat is effecting the environment of Pakistan badly.

Is it conceivable to convert this wasted heat into some useful work/energy/electricity or not. If yes how? If no why?”

Select correct options among the following statements concerning the creation of magnetic fields.

a. The single electric charge produces a magnetic field at all points in the surrounding area.
b. The moving electric charge produces a magnetic field at all points in the surrounding area.
c. When the electric charges are distributed at rest it produces a magnetic field at all points in the surrounding area.
d. Current flowing in a conductor creates a magnetic field at all points in the surrounding area.
e. The magnetic field is created at all points in the surrounding region by the permanent magnet

Which of the following does not affect the electrical resistance of a body?

a. Temperature of the body
b. Length of the body
c. Material composing the body
d. Bodies directly surrounding the body

D. Bodies directly surrounding the body do not affect the electrical resistance of a body.

Figure CQ16.3 shows equipotential contours in the region of space surrounding two charged conductors. Find (a) the work in W_AB in electron volts done by the electric force on a proton that moves from point A to point B. Similarly, find (b) W_AC, (c) W_AD, and (d) W_AE.