Electric Current And Circuits

Electric current in a circuit is given as a function of time as below . I=I_(0)((3t)/(2tau)) Calculate the rms value of current for the time period t=0 to 2tau .

Electric current is circuit is measure by:

The electric current in AC circuit is given by the relation i = 3sinomegat + 4cosomegat . The rms value of the current in the circuit in ampere is

Name the instrument used to measure (i) electric current in a circuit, (ii) potential difference between two points in a circuit.