The induced voltage on the pick-up coil with n1=20 turns is 293 mv. after adding a number of turns the new value of the induced voltage becomes 1.8 v. what is the new number of turns, n2, on the pick-up coil? express the answer as a whole number.

To solve the problem it is necessary to take into account the concepts related to induced voltage.

The induced voltage, when the flow is constant, becomes directly proportional to the number of turns of the coil, that is

Getting the relationship we have to

Re-arrange to find N_2 we have

Replacing with our values

There is 123Turns at the second coil.

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.