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Electrical Engineering : Recent Questions and Answers (Page 32)

Find answers to your questions about Electrical Engineering or help others by answering their Electrical Engineering questions.

Relationship between torque and back-EMF voltage | BLDC motor modeling

I want to simulate an BLDC motor, so I am studying corresponding mathematical model. My problem is that I am little bit confused by the torque equation. ...

Asked on 11/06/2021 by Daniel Šebík

2 answer

Carrier concentration decreasing with increase in temperature in a semiconductor

I have come across this equation in my semiconductor study $$n_{0}=n_{i} exp left(frac{E_{F}-E_{i}}{K{T}}right)$$ where$$n_i$$ is the intrinsic electron concentration . This equation gives us...

Asked on 11/06/2021

1 answer

What are non-reciprocal bandpass filters?

I am not an electrical engineer. I have come to know about a term called as "Non-reciprocal Bandpass filters" which seems to be useful to me. Here are some links...

Asked on 11/06/2021

1 answer

Op-amp input signal problem, mismatched

My signal generator drives a 50 ohm coaxial cable, terminated with a 50 ohm to ground at the input of a voltage amplifier. However, when I look at my input...

Asked on 11/06/2021

1 answer

Amplifier design help

I am designing a two stage Amplifier for class, and I had asked for help before on the forum which helped a lot. Input is a 1v sine wave.My...

Asked on 11/06/2021 by Adam Cave

3 answer

What is this connector called? TDS Meter connector

I am trying to extend my sensor's cable as it is only 50cm.I do not want to cut the cable in case I want to revert back. The sensor...

Asked on 11/06/2021 by Edwin Martin

1 answer

Interpreting the differential resistance of a Zener diode

I have this Zener diode - 12V rated C part. I just want to understand how to read the differential resistance column on table 8 for Zener...

Asked on 11/06/2021

2 answer

Mysterious energy disappearance of capacitors

Consider a capacitor, $$ C= frac{Q}{V}$$ To derive the energy of this device, $$ U = int V cdot dq$$ $$ U = int frac{Q}{C} cdot dq$$...

Asked on 11/06/2021

8 answer

Best way to create a daylight charging station and for a laptop of 135W consumption with solar energy and lower battery capacity posible

I want to create a charging station and for a laptop of 135W consumption with solar energy, because in my area electricity outages are normal (5 hours per day or...

Asked on 11/06/2021 by Xiul

2 answer

what's "wrong" with diesel generator power?

The electric company was working on the power lines for four days out in the woods, so they put our street on huge diesel generators (each was the size of...

Asked on 10/29/2021

2 answer

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