Topic :: Ohm
Which of the following statements are correct for Ohm?s Law? (1) Electric current across the conductor and the multiple of the potential difference of conductor indicate resistance (2) The ratio of potential difference of conductor and electric current across the conductor is always constant (3) If all the physical states are constant, then potential difference across the conductor is directly proportional to its passing electric current (4) If all the physical states are constant, then the potential difference across any matter which conducts electricity is inversely proportional to its flowing current
1 4204A wire of resistance 10 ohms is drawn out to three times its original length. The new resistance will be (1) 90 ohm (2) 10 ohm (3) 30 ohm (4) 120 ohm
6 12654A wire of resistance 24 ohms is bent in the form of a circular ring. The effective resistance between the two points on any diameter of the circle is (1) 24 ohms (2) 12 ohms (3) 6 ohms (4) 3 ohms
12 24927Three resistances of 2 ohms each are connected in a triangle. The resistance in ohms between any two corners is ?????.. ohms. (1) 3 (2) 4 (3) 6 (4) 4/3
1 3484it is clear that volts equal to the current as per ohms law. is it appliable to the AC power or only for DC. if it is appliacable to AC in transformers when voltage increases the voltage decreases ????? why??????????????
Bhel,
13 17493Is it possible to get earth resistance value"zero" Ohm practically??? If yes,which type of earthing???
TATA,
9 13993
How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).
How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).
if zero ohm is not adjusted on shorting the two terminal of multimeter what does it indicate
how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
how to calculate an ohmmeter(multiple range)?.. kindly show your computatations?.... plsss answer b4 feb. 1, 2010....... it is important thing..... hope for your kindness...........
how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?
In bently nevada vibration monitoring system,what is the reason to maintain the Resistance of the probe + extension cable equal to 95 ohm? If possible explain the basic principle of measurement with detail electronic circuits.
how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.
is below 2 ohms earth resistance is good for mobile tower
1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?
how we find transformer capacity by ohm
Help need in transformer !? Hello Friends The parameters of 2300/230 v 50hz t/f is R1=0.286 ohm R`2=0.319 ohm Rc=240 ohm X1=0.73 ohm X`2=0.73 ohm Xm=49.2 ohm Secondary Load impedance ZL=0.387+J0.29 solve the exact equivalent circuit with normal voltage across primery.. I know every thing but i cant find CURRENT I1=? and I`2=? Please help me give solution or only Formula please please...
what is the min and max ohmic resistance for the earthing rod installed for lighting poles for street light network
A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?
