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प्रश्न
Outline the necessary steps to convert a galvanometer of resistance RG into an ammeter of a given range ?
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उत्तर
Conversion of a galvanometer to ammeter
• A shunt (low resistance) is connected in parallel with the galvanometer.
`S = ((I_g)/(I -I_g))G`
Where,
I → Total current in circuit
G → Resistance of the galvanometer
S →Resistance of the shunt
Ig → Current through galvanometer
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संबंधित प्रश्न
The combined resistance of a galvanometer of resistance 500Ω and its shunt is 21Ω. Calculate the value of shunt.
The combined resistance of a galvanometer of resistance 500Ω and its shunt is 21Ω. Calculate the value of shunt.
Define current sensitivity of a galvanometer.
Define the current sensitivity of a galvanometer ?
Define the term ‘current sensitivity’ of a moving coil galvanometer.
In a moving coil galvanometer the deflection (Φ) on the scale by a pointer attached to the spring is ______.
Assertion (A): On Increasing the current sensitivity of a galvanometer by increasing the number of turns may not necessarily increase its voltage sensitivity.
Reason (R): The resistance of the coil of the galvanometer increases on increasing the number of turns.
Select the most appropriate answer from the options given below:
In an ammeter 0.5% of main current passes through galvanometer; If resistance of galvanometer is G, the resistance of ammeter will be.
A resistance of 3Ω is connected in parallel to a galvanometer of resistance 297Ω. Find the fraction of current passing through the galvanometer.
A galvanometer of resistance 100 Ω gives a full-scale deflection for a potential difference of 200 mV.
- What must be the resistance connected to convert the galvanometer into an ammeter of the range 0-200 mA?
- Determine resistance of the ammeter.
