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Electrical Engineering

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Electrical Engineering

How can the Internet of Things (IoT) be used to create a smart home automation system?

by EE-Expert in IoT Applications asked 1 month ago

How can the Internet of Things (IoT) be used to create a smart home automation system?

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Explain with the help of a circuit diagram, how the value of an unknown resistance can be determined using a Wheatstone bridge?

Explain with the help of a circuit diagram, how the value of an unknown resistance can be determined using a Wheatstone bridge?
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In a Hall Effect experiment, a voltage is measured perpendicular to both the current flow and the magnetic field. What is the physical origin of this "Hall Voltage," and what two crucial properties of a semiconductor material can be determined by measuring it?

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With suitable circuit diagram, show how emfs of 2 cells can be compared using a potentiometer?

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A battery of emf 10 V and internal resistance 3 Ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

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in Current Electricity

Three identical cells, each of emf. 2V and unknown internal resistance are connected in parallel. This combination is connected to a 5 ohm resistor. If the terminal voltage across the cell is 1.5 volt. What is the internal resistance of each cell? Hence define the internal resistance of a cell?

Three identical cells, each of emf. 2V and unknown internal resistance are connected in parallel. This combination is connected to a 5 ohm resistor. If the terminal voltage across the cell is 1.5 volt. What is the internal resistance of each cell? Hence define the internal resistance of a cell?
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A battery of emf E and internal resistance r sends a current, I1 , I2 when connected to an external resistance of R1 , R2 respectively. Find the emf. and internal resistance of the battery.

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Why do we prefer a potentiometer to measure the emf of a cell rather than a voltmeter?

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in Current Electricity

In a potentiometer arrangement, a cell of emf 1.25V gives a balance point at 35.0cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63.0cm , what is the emf of the second cell?

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Answer : ### Principle The working principle of a potentiometer is that the potential drop across any portion of a wire of uniform cross-section is directly proportional to the length of that portion, provided a constant current flows ... 2.25 V** ### Answer The EMF of the second cell is **2.25 V**....

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How are Fourier series used to analyze non-sinusoidal waveforms in electrical circuits?

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If a wire is stretched to double its length. What will be its new resistivity?

If a wire is stretched to double its length. What will be its new resistivity?
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State one condition for maximum current to be drawn from the cell?

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From a fundamental engineering mechanics perspective, what is the primary difference between a beam and a shaft, given that both are often long, slender components used in structural and mechanical systems?

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