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प्रश्न
Define current sensitivity of a galvanometer.
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उत्तर
Current sensitivity of a galvanometer is defined as the deflection produced in the galvanometer when a unit current flows through it.
θ = `("nBA")/"k""I"`
So, for a given value of I, θ will be large if `("nBA")/"k"` is large i.e n, B and A should be large and k should be small.
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संबंधित प्रश्न
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State how a moving coil galvanometer can be converted into an ammeter.
A galvanometer coil has a resistance of 12 Ω and the metre shows full scale deflection for a current of 3 mA. How will you convert the metre into a voltmeter of range 0 to 18 V?
A galvanometer coil has a resistance of 15 Ω and the metre shows full scale deflection for a current of 4 mA. How will you convert the metre into an ammeter of range 0 to 6 A?
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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:
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