Chin DBC Interview Questions and Answers

High voltage can be converted to low voltage in DC supply using a voltage regulator or a voltage divider circuit.

• Use a voltage regulator such as a buck converter to step down the voltage

• Implement a voltage divider circuit using resistors to reduce the voltage

• Choose the appropriate components based on the input and output voltage requirements

• Ensure proper heat dissipation to prevent overheating of components

A step-down transformer is used to convert high voltage to low voltage in DC supply.

• Step-down transformer is commonly used for this purpose

• It reduces the voltage while maintaining the same frequency

• Examples include power adapters for electronic devices

Analog signals are continuous and can have infinite values, while digital signals are discrete and have a finite number of values.

• Analog signals have a smooth waveform, while digital signals have a stepped waveform.

• Analog signals are affected by noise and interference more than digital signals.

• Analog signals can have an infinite number of possible values, while digital signals have a limited number of discrete values (usually 0 and 1).

Resistance and capacitor faults can be checked using a multimeter.

• Use a multimeter to measure the resistance of a resistor. A good resistor will have a resistance value within its tolerance range.

• For capacitors, check for any physical damage such as bulging or leaking. Use a multimeter in capacitance mode to measure the capacitance value.

• In case of capacitors, also check for any signs of overheating or burning marks on the component.

• For both resistance and capacitors, compare...read more

AC to DC conversion involves using a rectifier to change the direction of current flow.

• Use a rectifier to convert AC to DC by changing the direction of current flow.

• Types of rectifiers include half-wave, full-wave, and bridge rectifiers.

• Examples of rectifiers include diode rectifiers and semiconductor rectifiers.