1). What is an Electrical Circuit?
An electric circuit is a closed route along which electric current flows. It usually contains
- Resistors,
- Capacitors,
- Inductors,
- Switches and
- Voltage (or) current source.
2). What are the primary types of Electrical Circuits?
The three primary types of electric circuits are
- Series circuits,
- Parallel circuits and
- Series-parallel (combination) circuits.
3). What function does a Fuse perform in a circuit?
A fuse is a safety device that melts and disconnects a circuit when the current exceeds a set limit.
4). What is Ohm’s law?
According to Ohm’s Law, the current flowing through a conductor between the two points is directly proportional to the voltage and inversely proportional to the resistance.
Formula: V = I x R
5). What is Kirchhoff’s Current Law (KCL)?
Kirchhoff’s Current Law states that the algebraic sum of currents entering a junction is equal to the sum of currents leaving the junction.
6). What is Kirchhoff’s Voltage Law (KVL)?
Kirchhoff’s Voltage Law states that the sum of all voltages around a closed loop in a circuit is equal to zero.
7). What is a Ground in an electrical circuit?
Ground is a zero-voltage reference point in an electric circuit that serves as a current return path.
8). What is Resistance?
Resistance is an objection to the flow of electric current in a conductor measured in ohms (Ω).
9). What is Conductance?
Conductance is the inverse of resistance indicating how easily electric current flows via a material. It is measured in Siemens (S).
10). What is the unit of Electrical Power?
The watt (W) is the unit of electrical power, which equals one joule per second.
11). What is the Formula for Electric Power?
The equation for electrical power (P) is
P = V x I
where
V represents voltage and
I represents current.
12). What is a Resistor?
A resistor is a passive electrical component that limits or controls the current in an electric circuit.
13). What is the Color Code for Resistors?
The resistor color code is a series of colored bands that express the resistance value & tolerance on a standardized chart.
14). What is a Capacitor?
A capacitor is a component that accumulates electrical energy in an electric field & releases it as needed.
15). What is Capacitance?
Capacitance is a capacitor’s ability to store electric charge per unit voltage expressed in farads (F).
16). What is an Inductor?
An inductor is a wire coil that stores energy in a magnetic field if electric current flows through it.
17). What is Inductance?
Inductance is the ability of an inductor to resist changes in current flow, measured in henrys (H).
18). What is Mesh in Circuit Analysis?
A mesh is a closed loop in a circuit that does not contain any other loops and is used for mesh current analysis.
19). What is the Overall Resistance of a Series Circuit?
The total resistance in a series circuit is the sum of all individual resistances.
RTotal = R1 +R2 +R3
20). What is the Overall Resistance of a Parallel Circuit?
The total resistance in a parallel circuit is given as:
1/RTotal = 1/R1 +1/R2 +1/R3
21). Define a Short Circuit
A short circuit happens if a low-resistance route allows excessive current to pass, resulting in overheating (or) damage to circuit components.
22). What is a Voltage Divider?
A voltage divider is a basic circuit that divides an input voltage into smaller voltages by utilizing a series of resistors.
23). What is a Current Divider?
A current divider divides the overall current into fractional currents in parallel branches based on their resistance.
24). What is a Load in an Electric Circuit?
A load is defined as any component or equipment that uses electrical power such as
- Lighting,
- Motors &
- Resistors.
25). What is a Node in an Electrical Circuit?
A node is the point in a circuit where two (or) more circuit elements intersect.
