20+ Vodafone Idea Interview Questions and Answers

The voltage across a capacitor depends on the charge stored on it and the capacitance. Ripple and amplitude of the curve depend on the input waveform.

• Voltage across a capacitor is given by V = Q/C, where Q is the charge stored on the capacitor and C is the capacitance.

• The ripple in the voltage across the capacitor depends on the input waveform and the load on the capacitor.

• The amplitude of the curve will depend on the peak voltage of the input waveform and the capacitance of ...read more

The current flowing through an RL circuit is initially zero and increases exponentially over time.

• At t=0, the current in an RL circuit is zero as the inductor initially resists changes in current

• As time progresses, the current in the RL circuit increases exponentially towards its maximum value

• The time constant of the RL circuit determines how quickly the current reaches its maximum value

Adding a capacitor in series with RLC circuit will affect the current vs time graph.

• The addition of a capacitor will introduce a phase shift in the current waveform.

• The presence of the capacitor will cause the current to oscillate at a different frequency compared to the original RLC circuit.

• The amplitude of the current waveform may also change with the addition of the capacitor.

The voltage across the diode in a buck converter depends on the input voltage, duty cycle, and load resistance.

• The voltage across the diode is typically equal to the input voltage minus the voltage drop across the diode.

• The duty cycle of the buck converter affects the average voltage across the diode.

• The load resistance also impacts the voltage across the diode.

• For example, if the input voltage is 12V, the diode has a voltage drop of 0.7V, and the duty cycle is 0.5, the volta...read more

Power Electronics

• I enjoy working with power electronic circuits and devices

• I find the control and conversion of electrical power fascinating

• Power electronics plays a crucial role in renewable energy systems

• Examples: inverters, converters, motor drives

To convert 100 V DC to 40 V DC, a buck converter can be used.

• Buck converter steps down voltage by controlling the duty cycle of a switch

• It consists of an inductor, a diode, a capacitor, and a switch (usually a MOSFET)

• Example: Use a buck converter with a duty cycle of 0.4 to convert 100 V DC to 40 V DC

The final voltage will depend on the specific circuit and components involved.

• Final voltage can be calculated using Ohm's Law (V = IR) where V is voltage, I is current, and R is resistance.

• The final voltage may also be affected by factors such as the type of power source, circuit configuration, and any voltage drops across components.

• It is important to consider the voltage rating of components to ensure they can handle the final voltage.

• Final voltage can be measured using a m...read more

Yes, it is possible to pump a two-phase fluid. However, there are pros and cons to consider.

• Pros: Can transport a larger volume of fluid compared to pumping only liquid phase, can handle mixtures with varying liquid-to-gas ratios

• Cons: Requires specialized equipment to handle two-phase flow, increased risk of cavitation and erosion in the pump

• Example: Pumping a mixture of water and steam in a power plant condenser system

Embedded projects involve designing and developing systems that are integrated into larger systems or devices.

• Embedded projects require knowledge of hardware and software integration.

• They often involve programming microcontrollers or microprocessors.

• Examples include designing a smart thermostat, a wearable fitness tracker, or an automotive infotainment system.

Developing a mobile app for tracking daily water intake

• Creating user-friendly interface for inputting water consumption

• Implementing notifications to remind users to drink water

• Incorporating a visual representation of daily water intake goals

• Integrating a database to store user data securely