10 Answered Questions for the topic Electronics


How do I calculate the instantaneous voltage?

A sine wave voltage has a maximum value of 12 V and a frequency of 80 Hz. Calculate the instantaneous voltage at 10 ms. It's a multiple choice question and the following choices are:A. -11.4 VB. 0... more

Digital logic Design(Making a Circuit)

Design a car security system which has 4 sensors on all 4 doors. The system works such that it sounds an alarm if it detects any intrusion from any of the 4 doors. When the alarm begins... more



Determine the resonance frequency of the tank circuit shown in the figure. The individual component values areL = 5 mH; C = 5 nF


can we use 200 volts voltmeter for 230volts ac current if we use what will appen

please tell me the answer 


Technician A says the transistor is a key component in any electronic device. Technician B says there are three types of transistors

Technician A says the transistor is a key component in any electronic device. Technician B says there are three types of transistors. Who is correct?Select one:a. Technician Ab. Technician Bc. Both... more
Electronics Physics Calculus 1


What is the current when time = 2 seconds?

The charge q on a certain capacitor in an amplifier circuit as a function of time t is given by:   just to be clear π= pie   q = e-0.1t (0.2 sin 120πt + 0.8 cos 120πt)   the current i in the... more
Electronics Physics Circuits Kvl


Analyzing a curcuit

  I've been taking an online course in electronics (basic), and I've been having a hard time solving this circuit, pic: http://bit.ly/1rlDP1V   The goal is to find value of v3, i5, power dissipated... more

What would be five different states through which ports on a switch running STP can transition.

Sorry for the many questions, only asking cause like I said in my previous question my knowledge is little in the networking field and any help would be much appreciated. How do you bypass the... more


why 1/C ? V/R(e^-t/RC) dt is equal to V(1-e^-t/RC) Note: V,R and C are constants. I integrated but I got -Ve^-t/RC

perhaps I'm ommiting some detail in my integration and I'm eager to know why it doesn't match with the textbook result.


what is the charge in coulombs of the nucleus of a copper atom

principles of electric circuit , electron flow version

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