CHAPTER 14. ELECTRONICS 14.6
R
Q
S
Figure 14.25: The output of a bistable circuit is reset (made 0) by raising the‘R’ input
to 1. Wires carrying high logic levels (1) are shown with thicker lines.
- Draw a circuit diagram for a bistable circuit (RS flip flop). Make three extra copies
of your diagram. On thefirst diagram, colour inthe wires which will carry high
voltage levels (digital 1) if the R input is low,and the S input is high. On the
second diagram, colourin the wires which carryhigh voltage levels if theS input
of the first circuit is nowmade low. On the thirddiagram, colour in thewires
which carry high voltage levels if the R input is now made high. Onthe final
diagram, colour in thewires carrying high voltage levels if the R input is now
made low again.
- Justify the statement:a modern computer contains millions of transistors.
More practice video solutions or help at http://www.everythingscience.co.za
(1.) 01ka (2.) 01kb (3.) 01kc (4.) 01kd (5.) 01ke (6.) 01kf
(7.) 01kg
Chapter 14 — Summary
See the summary presentation ( Presentation: VPrwa at http://www.everythingscience.co.za)
- The current in a circuitleads the voltage on a capacitor in the circuit in phase by
90 o.
- The instantaneous value ofVRchanges but capacitive reactance, which is the ratio
of the maximum values,is useful, XC.
- The current in a circuitlags the voltage on an inductor in the circuit in phase by
90 o.
