The diagram above illustrates a waveform. Determine the number of wavelengths in it

A resistor with fixed resistance value is called a

Which of the following statements is not an advantage of an alkaline accumulator?

The diagram above illustrates the wire connections to a three-pin plug. The wires P, Q and R respectively are:

Which of the following statements about parallel plate capacitors is/are correct?

I. Capacitance of the capacitor  is inversely proportional to the distance between the plates

II. Capacitors can filter a.c signals from d.c 

III. Capacitors can store charges