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प्रश्न
Figure shows two circuits each having a galvanometer and a battery of 3V.
When the galvanometers in each arrangement do not show any deflection, obtain the ratio R1/R2.
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उत्तर
For balanced wheat stone bridge, there will be no deflection in the galvanometer.
`4/R_1 = 6/9 => R_1 =(4 xx 9)/6 = 6Ω`
For the equivalent circuit, when the wheat stone bridge is balanced, there will be no deflection in the galvanometer.
`therefore 12/8 = 6/R_2 => R_2 \ ( 6xx 8)/12 = 4 Ω`
`therefore R_1/R_2 = 6/4 = 3/2`
संबंधित प्रश्न
Draw a labelled diagram of a moving coil galvanometer. Describe briefly its principle and working.
Can a galvanometer as such be used for measuring the current? Explain.
In the meter bridge experiment, balance point was observed at J with AJ = l.
(i) The values of R and X were doubled and then interchanged. What would be the new position of balance point?
(ii) If the galvanometer and battery are interchanged at the balance position, how will the alance point get affected?
Outline the necessary steps to convert a galvanometer of resistance RG into an ammeter of a given range ?
State how a moving coil galvanometer can be converted into an ammeter.
The conversion of a moving coil galvanometer into a voltmeter is done by ______.
The current sensitivity of a galvanometer increase by 20%. If its resistance also increases by 25%, the voltage sensitivity will ______.
A galvanometer shows full-scale deflection for current Ig. A resistance R1 is required to convert it into a voltmeter of range (0 - V) and a resistance R2 to convert it into a voltmeter of range (0 - 2V). Find the resistance of the galvanometer.
A moving coil galvanometer of resistance 55 Ω produces a full scale deflection for a current of 250 mA. How will you convert it into an ammeter with a range of 0 - 3A?
Assertion: When an electric current is passed through a moving coil galvanometer, its coil gets deflected.
Reason: A circular coil produces a uniform magnetic field around itself when an electric current is passed through it.
