Class 12PhysicsMoving Charges and MagnetismThe Moving Coil Galvanometer (Sensitivity) and Ammeter and Voltmeter Conversion
Difficult$STATEMENT-1$: The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil.
$STATEMENT-2$: Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.
$STATEMENT-2$: Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.
- A$STATEMENT-1$ is True,$STATEMENT-2$ is True; $STATEMENT-2$ is a correct explanation for $STATEMENT-1$.
- B$STATEMENT-1$ is True,$STATEMENT-2$ is True; $STATEMENT-2$ is $NOT$ a correct explanation for $STATEMENT-1$.
- C$STATEMENT-1$ is True,$STATEMENT-2$ is False.
- D$STATEMENT-1$ is False,$STATEMENT-2$ is True.
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Similar Questions
Match 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 |
Medium
View SolutionThe deflection in a moving coil galvanometer of resistance $45 \Omega$ falls from $30$ divisions to $3$ divisions. The length of the shunt wire required to convert the galvanometer into an ammeter is [specific resistance of the material of the shunt wire $= 5 \times 10^{-7} \Omega m$ and area of cross-section of the wire $= 4 \times 10^{-7} m^2$]. (in $m$)
$A$ galvanometer of resistance $G$ is shunted by a resistance $S$. To keep the main current in the circuit unchanged,the resistance to be put in series with the galvanometer is
MediumAIPMT 2011
View Solution$A$ milliammeter of resistance $40 \Omega$ has a range $0-30 \text{ mA}$. What will be the resistance used in series to convert it into a voltmeter of range $0-15 \text{ V}$ (in $\Omega$)?
$A$ shunt of resistance $1\,\Omega$ is connected across a galvanometer of $120\,\Omega$ resistance. $A$ total current of $5.5\,A$ is passed through the combination,which gives full-scale deflection in the galvanometer. The current that would give full-scale deflection in the absence of the shunt is nearly ............... $A$.
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