1. 2. 3. A common transistor ratio set requires 12V (D.C) for its operation. The D.C source is constructed by using a transformer and a rectifier circuit, which are operated at 220V (A.C) on standard domestic A.C, supply. The number of turns of secondary coil are 24, then the number of turns of primary are An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2. Its velocity in the this medium 107 m/s. is The root mean square speed of molecules of a given mass of a gas at 27C and 1 atmosphere pressure is 20 ms. The root mean square speed of molecules of the gas at 127C and 2 atmosphere pressure is ms. The value of x will be.............. 3