
Miscellaneous questions on Part I 161
to a 50 Hz supply. Calculate its capacitance.
126.
A capacitor of reactance 20
Ω
and a pure inductor of reactance 10
Ω
are connected in series across a 240 V supply. Calculate the current
taken from the supply.
127.
A capacitor of value 8 μ F is connected in parallel with a resistance
of 200
Ω
across a 240 V supply. Calculate the current taken by each
component, and by means of a phasor diagram, determine the
value of the supply current.
VOLUME 2, CHAPTER 3
128.
With the aid of diagrams, show how the power factor of an induct-
ive load such as a fluorescent lighting unit may be improved.
129.
Why is it desirabl ...