CURRENT ELECTRICITY INTERVIEW QUESTIONS AND ANSWERS 
Q: What is electric current?
A: Electric current is the flow of electric charge in a circuit. It is measured in amperes (A).Q: What is Ohm's Law?
A: Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied to it, The mathematical expression of Ohm's Law is I = V/R, where I is the current, V is the voltage, and R is the resistance.Q: What is resistance?
A: Resistance is the property of a material to resist the flow of electric current. It is measured in ohms (Ω).Q: What is a circuit?
A: A circuit is a closed path through which electric current can flow.Q: What is a series circuit?
A: A series circuit is a circuit in which the components are connected one after the other in a line, so that the same current flows through each component.Q: What is a parallel circuit?
A: A parallel circuit is a circuit in which the components are connected across each other, so that the same voltage is applied across each component.Q: What is a capacitor?
A: A capacitor is an electrical component that stores electric charge. It consists of two conductive plates separated by an insulating material.Q: What is a diode?
A: A diode is an electrical component that allows current to flow in only one direction.Q: What is an inductor?
A: An inductor is an electrical component that stores energy in a magnetic field. It consists of a coil of wire.Q: What is a transformer?
A: A transformer is an electrical device that transfers energy from one circuit to another by electromagnetic induction. It consists of two coils of wire, one of which is connected to the input circuit and the other to the output circuit.Q: What is the difference between alternating current (AC) and direct current (DC)?
A: AC is a type of current that changes direction periodically, whereas DC flows in one direction only. AC is typically used for power transmission over long distances, while DC is often used in electronic devices.Q: What is a circuit breaker?
A: A circuit breaker is an electrical safety device that automatically switches off a circuit when it detects an overload or a short circuit.Q: What is a fuse?
A: A fuse is an electrical safety device that contains a metal wire or filament that melts and breaks the circuit when there is an excessive current flow.Q: What is electrical power?
A: Electrical power is the rate at which electrical energy is transferred or used. It is measured in watts (W).Q: What is the difference between power and energy?
A: Energy is a measure of the amount of work that can be done, while power is a measure of how quickly work can be done. Energy is measured in joules (J), while power is measured in watts (W).Q: What is a battery?
A: A battery is a device that stores chemical energy and converts it into electrical energy.Q: What is a voltage regulator?
A: A voltage regulator is an electronic device that maintains a constant voltage level in a circuit.Q: What is a transistor?
A: A transistor is an electronic device that can amplify or switch electronic signals.Q: What is an integrated circuit?
A: An integrated circuit (IC) is a miniaturized electronic circuit that contains multiple components, such as transistors, resistors, and capacitors, on a single semiconductor substrate. ICs are used in a wide variety of electronic devices.Q: What is a breadboard?
A: A breadboard is a tool used for prototyping and testing electronic circuits. It allows electronic components to be easily connected and disconnected without the need for soldering.Q: What is a multimeter?
A: A multimeter is an electronic tool used to measure voltage, current, and resistance in a circuit.Q: What is a resistor?
A: A resistor is an electrical component that limits the flow of electric current. It is commonly used to control the amount of current that flows through a circuit.Q: What is a potentiometer?
A: A potentiometer is a variable resistor that allows the user to adjust the resistance value.Q: What is a relay?
A: A relay is an electrical switch that is controlled by an electromagnet. It is commonly used to control high-power or high-voltage circuits using a low-power signal.Q: What is a sensor?
A: A sensor is an electronic device that detects and responds to a physical stimulus, such as light, temperature, pressure, or motion.Q: What is an oscilloscope?
A: An oscilloscope is an electronic tool used to display and analyze signals in a circuit. It displays voltage as a function of time, allowing users to observe waveforms and measure signal characteristics.Q: What is a transducer?
A: A transducer is a device that converts one form of energy into another. For example, a microphone is a transducer that converts sound waves into electrical signals, and a speaker is a transducer that converts electrical signals into sound waves.Q: What is a motor?
A: A motor is an electrical device that converts electrical energy into mechanical energy. It is commonly used to generate motion in a wide range of applications.Q: What is a generator?
A: A generator is an electrical device that converts mechanical energy into electrical energy. It is commonly used to generate electricity in power plants and other applications.Q: What is a solenoid?
A: A solenoid is an electrical coil that generates a magnetic field when an electric current is passed through it. It is commonly used in mechanical applications to create motion or force.Q: What is Kirchhoff's Law?
A: Kirchhoff's Law is a set of rules used to analyze complex electrical circuits. The two main laws are Kirchhoff's Current Law, which states that the total current entering a junction is equal to the total current leaving it, and Kirchhoff's Voltage Law, which states that the total voltage around a closed loop in a circuit is equal to zero.