Class 12PhysicsMoving Charges and MagnetismThe Moving Coil Galvanometer (Sensitivity) and Ammeter and Voltmeter Conversion
MediumThe resistance of a galvanometer is $90\, \Omega$. If only $10\%$ of the main current is to flow through the galvanometer,how should a resistor be connected and what should be its value?
- A$10\, \Omega$ in series
- B$10\, \Omega$ in parallel
- C$810\, \Omega$ in series
- D$810\, \Omega$ in parallel
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View SolutionMatch the terms given in List-$I$ with suitable options provided in List-$II$ regarding the experiment to calculate the resistance and figure of merit of a galvanometer using the half-deflection method:
List-$I$ List-$II$ $A$. Figure of merit $(k)$ $P$. in series $B$. Current sensitivity $(SI)$ $Q$. to get power loss minimized $C$. Deflection is made half by using low resistance $R$. in shunt/parallel $D$. High resistance box $S$. current per unit deflection $T$. deflection per unit current
| List-$I$ | List-$II$ |
|---|---|
| $A$. Figure of merit $(k)$ | $P$. in series |
| $B$. Current sensitivity $(SI)$ | $Q$. to get power loss minimized |
| $C$. Deflection is made half by using low resistance | $R$. in shunt/parallel |
| $D$. High resistance box | $S$. current per unit deflection |
| $T$. deflection per unit current |
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View SolutionWhen a shunt of $4\,\Omega$ is connected to a galvanometer,the deflection reduces to $1/5$ of its initial value. If an additional shunt of $2\,\Omega$ is connected in parallel,what will be the new deflection?
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View SolutionThe resistance of an ammeter is $13\, \Omega$ and its scale is graduated for a current up to $100\, A$. After an additional shunt has been connected to this ammeter,it becomes possible to measure currents up to $750\, A$ by this meter. The value of the shunt resistance is:
MediumAIPMT 2007
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