Lab Report
A. ENG237-02: Transients in RC and RL Circuits
0. Introduction
The objective of this experiment is to study the DC transient behaviors of RC and RL circuits.
This experiment has divided into 6 parts: 1. Charging curve from measured data ( R = 10M Ω and C = 4 mF ) 2. Draw the charging curve by the graphical method 3. Discharging curve from measured data ( R = 5M Ω and C = 4 mF ) 4. Draw the discharging curve by the graphical method 5. Display of the charging and discharging curve of capacitor 6. Display of the charging and discharging curve of inductor
1. Theories (a) Capacitor
Capacitor is an electrical passive device for storing charge in the form of electric field. In its simplest from, It consists basically consists of two conductors which are separated by a dielectric medium (non-conductor) such as air, waxed paper, plastics, etc. The capacitance of capacitor is directly proportional to the surface areas and the inverse of the separation of the two conductors. The dielectric constant of the non-conductor is also affecting the capacitance.
FIGURE 1 Capacitor symbol
For an ideal capacitor, the capacitor current iC is proportional to the time rate of change of the voltage across the capacitor:
Where C is the proportionality constant and is known as capacitance.
(b) Inductor
Inductor is an electrical passive device for storing energy in the form of magnetic field. In its simplest from, It consists basically consists of a wire loop or coil. The inductance is directly proportional to the number of turns in the coil. Inductance also depends on the radius of the coil and on the type of material around which the coil is wound.
FIGURE 2 Inductor symbol
For an ideal inductor, the inductor voltage VL is proportional to the time rate of change of the current through the inductor:
Where L is the proportionality constant and is known as inductance.
(c) RC circuit
RC circuit is consists of resistor and
0. Introduction
The objective of this experiment is to study the DC transient behaviors of RC and RL circuits.
This experiment has divided into 6 parts: 1. Charging curve from measured data ( R = 10M Ω and C = 4 mF ) 2. Draw the charging curve by the graphical method 3. Discharging curve from measured data ( R = 5M Ω and C = 4 mF ) 4. Draw the discharging curve by the graphical method 5. Display of the charging and discharging curve of capacitor 6. Display of the charging and discharging curve of inductor
1. Theories (a) Capacitor
Capacitor is an electrical passive device for storing charge in the form of electric field. In its simplest from, It consists basically consists of two conductors which are separated by a dielectric medium (non-conductor) such as air, waxed paper, plastics, etc. The capacitance of capacitor is directly proportional to the surface areas and the inverse of the separation of the two conductors. The dielectric constant of the non-conductor is also affecting the capacitance.
FIGURE 1 Capacitor symbol
For an ideal capacitor, the capacitor current iC is proportional to the time rate of change of the voltage across the capacitor:
Where C is the proportionality constant and is known as capacitance.
(b) Inductor
Inductor is an electrical passive device for storing energy in the form of magnetic field. In its simplest from, It consists basically consists of a wire loop or coil. The inductance is directly proportional to the number of turns in the coil. Inductance also depends on the radius of the coil and on the type of material around which the coil is wound.
FIGURE 2 Inductor symbol
For an ideal inductor, the inductor voltage VL is proportional to the time rate of change of the current through the inductor:
Where L is the proportionality constant and is known as inductance.
(c) RC circuit
RC circuit is consists of resistor and