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What is the value of the smallest division on an ammeter scale?
Wiki User
∙ 11y ago
what is the value of the smallest division on a ammeter
Wiki User
∙ 11y ago
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Why shunt resistance used in ammeter and why is it connected in parallel?
An ammeter's coil requires very little current for full-scale deflection (fsd). So, to measure a current above its fsd value, most of that current must be allowed to bypass the coil. This is achieved by placing a very low value shunt resistance in parallel with the coil ('shunt' is an archaic word for 'parallel').
Why shunt resistance must be small in ammeter?
An ammeter has to measure to current flowing through the circuit. Resistance offers an obstruction to the current flow. So, if the resistance of an ammeter is large , the current measured by the ammeter will be quite less as compared to the actual amount of current flowing through the circuit which is undesirable. If ammeter has zero resistance , then it will give the exact value of current. But this is not practically possible because every material has some value of internal resistance which we can't control. For this reason , ammeter must have small resistance
Why the windings of an ammeter should be of thick wire?
because lots of current is likely to be flowing through them.however a shunt ammeter is easier to build than the direct ammeter as described above. in a shunt ammeter you use an ordinary meter wound with fine wire and put a small value shunt resistor across it to take almost all the current.
What happen when ammeter connected in parallel?
an ideal ammeter has zero or negligible resistance when this is connected in series no effective resistance would be added in the circuit so that the value of curret that we get is exactly of the circuit only. but when the ammeter is connected in parllel as it has zero resistance , the resistor to which it is connected in parllel gets shorted and due to his the effective resistance of the circuit is changed and so the effective current ... due to this the w=value measured by the ammeter would be different (incresed due to dec. in effective resistance)
Functions of a multimeter?
A multimeter combines the functions of an ammeter, voltmeter, and ohmmeter and, so, can be used to measure current, voltage, and resistance by selecting the appropriate scale/setting.
What is the value of the smallest division on the scale?
what is the value of the smallest division on a ammeter
What is the least count value of vernier caliper and screw?
LC FOR VERNIER CALIPER-0.1mm LC FOR MICROMETER -0.01 mm L.C- NO OF SMALLEST DIVISION ON MAIN SCALE ------------------------------------------------------- TOTAL NO OF DIVISION ON VERNIER SCALE
How do you calculate least count of spectrometer?
The value of each main scale divisions is half a degree(30') . The number of vernier scale divisions is 30. 29 main scale divisions are divided into 30 vernier scale divisions (30 VSD = 29 MSD ) Therefore value of 1 VSD = 29/30 MSD. Least Count (L.C.) = 1MSD - 1VSD = 1MSD - 29/30 MSD = 1/30 MSD = 1/30 x 30' (L.C.) = 1' (1 minute)
How do you find least count of voltmeter and ammeter?
Least count of voltmeter is the value of one division on the scale. Formula is: Least count = Range/No. of divisions For example, if a voltmeter can measure from 0 to 40 V, and it has 100 divisions in total on the scale, then its least count is 40/100 = 0.4V
What is the meaning of scale division?
The scale divisions indicate the value of measuring units of volume, temperature, pressure, etc.
What is value of the fraction of the smallest division in the measurement 15.2?
2/10 = 1/5
What is Volt.DIV on the oscilloscope?
this referrs to the scale of measurement across the y axis ; in this case being the amplitude of a signal measure. this details how many volts are set per 1 division; usually 1 cm height, hence setting the control dial to 1 volt per division, will set the scale at 1 volt per cm. setting the dial at 0.1 volt per division will set the scale at 0.1 volt per cm division.
Why shunt resistance used in ammeter and why is it connected in parallel?
An ammeter's coil requires very little current for full-scale deflection (fsd). So, to measure a current above its fsd value, most of that current must be allowed to bypass the coil. This is achieved by placing a very low value shunt resistance in parallel with the coil ('shunt' is an archaic word for 'parallel').
What is vernier constant?
The difference between one main scale division and one vernier division is called vernier constant. this is the minimum length which can be measured accurately with the help of a vernier calipers. it is also called the least count of a vernier. Value of one main scale division is "1 mm" and value of one vernier scale division is "0.9 mm".So,the value of vernier constant is "1-0.9=0.1 mm".
How do you measure the value of the amplitude of an electric current?
With an ammeter or a shunt.
How get the least count verniar calliper?
LC= Value of one main scale division Total number of divisions on vernier
Why wouldn't the shunt resistor in the ammeter protect the ammeter when the ammeter is connected in parallel?
Connecting an ammeter in parallel subjects that ammeter to the full supply voltage. The shunt resistor is not designed to sustain that value of voltage and will burn out. Also, the clue is in the word 'shunt' (which means 'in parallel') which means that the coil will also burn out!
