Euphoria Electronics

1. In a circuit with an inductor, what happens to the current when the switch is suddenly opened?

• The current immediately drops to zero.

  
  

• The current gradually decreases over time and reaches zero.

• The current remains constant.

  
  

• The current increases exponentially.

  
  

2)What does Norton's theorem state about linear electrical networks?

•  Any linear electrical network can be replaced by an equivalent current source and parallel resistor.

  
  

•  Any linear electrical network can be replaced by an equivalent voltage source and series resistor.

  
  

• The total power consumed in a linear electrical network is always equal to the total power supplied.

  
  

• The voltage drop across any element in a linear electrical network is directly proportional to the current flowing through it.

  
  

In a parallel RLC circuit, at which frequency does the circuit have maximum impedance?

• Resonance frequency

  
  

• Lower cutoff frequency

  
  

•  Higher cutoff frequency

  
  

• The impedance remains constant across all frequencies.

  
  

How do smart grids facilitate the integration of electric vehicles into the grid ecosystem?

• By restricting access to charging stations

• By increasing fuel consumption

  
  

•  By enabling vehicle-to-grid (V2G) technology and smart charging

• By promoting the use of traditional vehicles

  
  

What is the primary difference between a power amplifier and a small-signal amplifier?

• Power amplifiers operate at higher voltages and currents.

  
  

•  Small-signal amplifiers are only used for digital signals.

  
  

•  Power amplifiers have higher distortion.

  
  

•  Small-signal amplifiers have lower efficiency

  
  

Which of the following is NOT a type of switchgear?

• Circuit breaker

  
  

•  Fuse

  
  

• Transformer

  
  

•  Isolator

  
  

What is the primary purpose of a smart grid?

• To distribute electricity more efficiently

  
  

• To generate electricity from renewable sources 

  
  

• To store excess electricity for future use

  
  

• To monitor wildlife habitats along power lines

  
  

In power electronics, what type of compensator is commonly used to improve the transient response of a closed-loop system?

• Lead compensator

  
  

• Lag compensator

  
  

•  Proportional compensator 

  
  

•  Integral compensator

  
  

Which technology has facilitated wireless charging of electronic devices and electric vehicles?

•  Inductive coupling 

  
  

•  Capacitive coupling

•  Conductive charging

• Magnetic resonance imaging

Which of the following amplifier classes exhibits the highest efficiency?

• Class A

  
  

•  Class B

  
  

• Class AB

  
  

• Class D