admin
11-13-2007, 08:27 PM
i have some doubts in the following questions given below.
can you please solve the answers or give some hints on these questions
1.Why should the diameter of the objective of a telescope be large?
2.You are given ‘a’ resistors, each of resistance ‘r’. These are first connected to get minimum possible resistance. In the second case, these are again connected differently to get maximum possible resistance. Compute the ratio between the minimum and maximum values of resistance so obtained.
3.Which one of the two, an ammeter or a milliammeter, has a higher resistance and why?
4.In what sense are eddy currents considered undesirable in a transformer and how are these reduced in such a device?
5.Write two properties of a material used as a suspension wire in a moving coil glvanometer
asked via email.....
can you please solve the answers or give some hints on these questions
1.Why should the diameter of the objective of a telescope be large?
2.You are given ‘a’ resistors, each of resistance ‘r’. These are first connected to get minimum possible resistance. In the second case, these are again connected differently to get maximum possible resistance. Compute the ratio between the minimum and maximum values of resistance so obtained.
3.Which one of the two, an ammeter or a milliammeter, has a higher resistance and why?
4.In what sense are eddy currents considered undesirable in a transformer and how are these reduced in such a device?
5.Write two properties of a material used as a suspension wire in a moving coil glvanometer
asked via email.....