10+ Arkray Healthcare Interview Questions and Answers

An oscillator is an electronic circuit that produces a repetitive electronic signal, typically a sine wave or square wave.

• An oscillator generates a periodic waveform without any external input signal.

• It uses positive feedback to sustain oscillations.

• Common types of oscillators include LC oscillators, crystal oscillators, and relaxation oscillators.

• Oscillators are used in various applications such as signal generation, clock generation, and frequency synthesis.

A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).

• Rectifiers are commonly used in power supplies to convert AC to DC for electronic devices.

• They can be half-wave, full-wave, or bridge rectifiers.

• Examples of rectifiers include diode rectifiers and silicon-controlled rectifiers (SCRs).

Modulation is the process of varying one or more properties of a high-frequency periodic waveform, called the carrier signal, with a modulating signal.

• Modulation is used to encode information on a carrier signal for transmission.

• There are different types of modulation techniques such as Amplitude Modulation (AM), Frequency Modulation (FM), and Phase Modulation (PM).

• Example: In AM, the amplitude of the carrier signal is varied in proportion to the waveform being transmitted.

• Ex...read more

Sampling is the process of selecting a subset of individuals from a larger population to represent the whole.

• Sampling helps in making inferences about the population based on the characteristics of the sample.

• Common sampling methods include random sampling, stratified sampling, and cluster sampling.

• For example, a survey conducted by selecting a random sample of households to represent the entire city's population.

A transistor is a semiconductor device used to amplify or switch electronic signals.

• Transistors consist of three layers of semiconductor material: the emitter, base, and collector.

• The working principle of a transistor involves controlling the flow of current between the emitter and collector using the base.

• Transistors can be used in various electronic devices such as amplifiers, switches, and oscillators.

• Common types of transistors include bipolar junction transistors (BJTs) ...read more

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is expressed as V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the relationship between voltage, current, and resistance in an electrical circuit.

• For example, if a circuit has a voltage of 12 volts and a resistance of 4 ohms, the current flowing through...read more

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

• Transistors are fundamental building blocks of modern electronic devices.

• They can be used as amplifiers, switches, or signal modulators.

• Transistors have three terminals: emitter, base, and collector.

• Common types of transistors include bipolar junction transistors (BJTs) and field-effect transistors (FETs).

PCB tool test within 1 hour

• Ensure familiarity with the PCB design software

• Practice creating and editing PCB layouts

• Test knowledge of design rules and constraints

• Verify ability to generate manufacturing files

• Check proficiency in schematic capture and library management

A thyristor is a solid-state semiconductor device that acts as a switch, controlling the flow of electric current.

• Thyristors are used in power control applications such as dimmer switches, motor speed control, and power supplies.

• They have three terminals: anode, cathode, and gate.

• Thyristors have a four-layer structure and are capable of handling high currents and voltages.

• Common types of thyristors include silicon-controlled rectifiers (SCRs) and triacs.

Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance.

• Ohm's Law is represented by the formula V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the relationship between voltage, current, and resistance in an electrical circuit.

• It is named after the German physicist Georg Simon Ohm who first formulated it in 1827.

Frequency refers to the number of occurrences of a repeating event per unit of time.

• Frequency is measured in Hertz (Hz)

• It is commonly used in physics to describe the number of waves that pass a fixed point in a given amount of time

• For example, if a sound wave completes 100 cycles in one second, its frequency is 100 Hz