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MCB Incoming Side
In connections of MCB, is it necessary that the incoming side supply should be connected at top side of MCB.Whether this has any effect in tripping of MCB in case of fault ? ( If connected reverse, it will not trip ! )
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BJT Control Device
Why BJT is called current control device?
tiya18leo
- Oct 8th, 2009
Because the input current of the transistor controls the output current, for example in CE configuration base current Ib controls the output current Ic.
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Potential Transformers
What are potential transformers?
bharati.anil
- Oct 20th, 2009
Potential Transformer is designed for monitoring single-phase and three-phase power line voltages in power metering applications. The primary terminals can be connected either in line-to-line or in li...
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FET Voltage Control Device
Why FET is known as voltage control device?
Dipankar Golder
- Oct 26th, 2009
Since in an FET the value of the current depends upon the value of the voltage applied at the gate and drain so it is known as voltage controlled device.For example: In a MOSFET, the current from drai...
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Why the feeding frequency to a microprocessor is twice the operating frequency
chakr
- Nov 7th, 2009
In 8085 there is an internal circuit wich devides the frequency feeded by external device by two.. 8085 operating frequency is 3MHZ we have to feed 6MHZ to it
nitin
- Feb 23rd, 2007
In order to execute machine cycle Mp need twice frequeny that of operating .
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Which of the following remarks about BDC is true ? 1. it is an 8-4-2-1 weight code 2. complement of a number can be found efficiently 3. (12345678)10 needs 4 bytes in BCD representation 4. conversion to and from the decimal system can be easily done
mahesh_venkat36
- Oct 12th, 2009
1,3,4 are correct options Because BCD is 8-4-2-1 weighted code, whose complement cannot be found easily, given number requires 4 bytes as it is 8 digit number (4 bits for number), it is easily converted to binary.
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Length of IR(Instruction register)
What is the length of IR(Instruction register) 1. 6 bits 2. 8 bits 3. 12 bits 4. 16 bits
chakr
- Nov 7th, 2009
Length IR depends on type arch we are using 8085 it's 8 bits in 8086 16 bits and in mips we have 32 and 64.
uday
- Mar 19th, 2007
Hai it is 16 bits guys
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Regulators without Filters
What problem arise if we use regulators without/before filters?
jayakumarau
- Nov 15th, 2009
Filters are used for reducing ripples. A regulator output will be having many ripples. So filters are used in a circuit for conversion of pulsating AC to DC
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Oscillator
Which oscillator is best for general purpose?
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Digital Vs Analog Technology
Where will Digital and Analog technology come into play in the CCTV technology in terms of data storage.
RZara
- Nov 24th, 2009
Data storage is mostly digital now-a-days because of cost,density,ease. CCTV or anything it may be, digital data is stored in ROM ( Read only Memory ) or EPROM (Erasable and Programmable ROM) or Flash...
vicky kumar
- Aug 7th, 2009
In digital technology, there are only two states, logic 0 and logic 1. They are fixed points. In analog technology, any two points can be represented as two logic levels.
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Mod-N counter
How can we identify how many states the ripple counter is having by looking at the figure as it can also have some invalid states?
RZara
- Nov 24th, 2009
If in the ripple counter, there are 3 flip flops, it is a mod-8 counter which counts from 0-7(binary). If additional circuitry is used, then it is a counter where few states have been trapped. Usually...
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Satellite Communication
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Ripple counter using edge-triggered JK flip-flop
In a ripple counter using edge-triggered JK flip-flop. the pulse input is applied to the 1. clock input of oll flip-flops 2. clock input of one flip-flop 3. J and K input of one flip-flop 4. J and K input of all flip-flops
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Signal Processing
Why do we convert Frequency Domain to Laplace Domain?
RZara
- Nov 24th, 2009
Frequency domain ----> deals with jw Laplace domain ----> deals with s, but s = (sigma) + ( jw )so with sigma = 0, laplace domain and frequency domain are the same. We convert time domain to eit...
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Breaker Capacity
Why making capacity of the circuit breaker is higher than breaking capacity?
rajashekharreddy
- Dec 4th, 2009
Making capacity is the max fault current it can carry during closing of breaker, e.g. You are closing a breaker on fault. The making capacity is always higher because it is expressed in peak value not rms, and also because of the DC offset, voltage and PF while closing
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The Cost of storing a bit is minimum in 1. Cache 2. Register 3. RAM 4. Magnetic tape
anil
- Sep 5th, 2007
Magnetic Tape
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What is the difference between Circuit Switching and Packet Switching?
jiya bhatia
- Jan 26th, 2010
Circuit switching is a transmission technique which is connection oriented. Connection has to be established before the actual data transmission takes place. While packet switching is connection less. The data is transmitted in the form packets one after other.
sukisudha
- Nov 13th, 2007
Circuit switching is the transmission technology that has been used since the first communication networks in the nineteenth century. In circuit switching, a caller must first establish a connection t...
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Q-METER
Q-Meter works on which principal?
kapilgupta.mnit
- Mar 10th, 2010
A direct-reading instrument which measures the Q of an electric circuit at radio frequencies by determining the ratio of inductance to resistance, and which has also been developed to measure many other quantities. Also known as quality-factor meter.
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TV Aspect Ratio
Why the aspect ratio of TV video display is 4:3 or 16:9? Why not it is any other?
kumar praveen bodu
- Mar 23rd, 2010
In TV it is conviniance to appear the object in horizontal manner, so it is better to fix the horizontal lengh more than vertical. 4:3 and 16:9 are the suitable lengths for human naked eye.
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Negative Logic
What is the equivalent of negative logic AND gate?
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