ABSTRACT
At the end of this chapter you should be able to:
• understand the term ‘transient’
• describe the transient response of capacitor and resistor voltages, and current in a series C-R d.c. circuit
• define the term ‘time constant’
• calculate time
• draw transient circuit
• use equations vC =V i= Ie−t /τ for a C-R circuit • describe the a capacitor
• describe the resistor voltages, and current in a series L-R d.c. circuit
• calculate time
• draw transient circuit • use equations vL i=I (1− e−t /τ ) • describe the in an L-R circuit • understand the
• describe the effects waveform via integrator and differentiator circuits
When a d.c. voltage is applied to a capacitor C and resistor R connected in series, there is a short period of time immediately after the voltage is connected, during which the current flowing in the circuit and voltages across C and R are changing. Similarly,when a d.c. voltage is connected to a circuit
having inductanceL connected in series with resistance R, there is a short period of time immediately after the voltage is connected, during which the current flowing in the circuit and the voltages across L and R are changing. These changing values are called transients.
