10 Answered Questions for the topic Electronics

10/31/20

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

11/20/17

Electronics

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

05/24/16

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

please tell me the answer 
Electronics

12/06/15

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

10/23/15

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

09/06/14

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
Electronics

05/21/14

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.
Electronics

09/14/13

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

principles of electric circuit , electron flow version

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