Questions in Current Electricity

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	The resistance of a galvanometer coil is R. What is the shunt resistance required to convert it into an ammeter of range 4 times
	If an ammeter is connected in parallel to a circuit, it is likely to be damaged due to excess
	In the given figure, battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 $\Omega$ is connected in parallel with the battery then it balances on 50 cm length of the potentiometer wire then internal resistance r of the battery is
	A galvanometer with a resistance of 12 $\Omega$ gives full scale deflection when a current of 3 mA is passed. It is required to convert it into a voltmeter which can read up to 18 V. the resistance to be connected is
	The resistance of an ideal ammeter is
	A galvanometer of 25 $\Omega$ resistance can read a maximum current of 6mA. It can be used as a voltmeter to measure a maximum of 6 V by connecting a resistance to the galvanometer. Identify the correct choice in the given answers
	A galvanometer has a resistance of 25 ohm and a maximum of 0.01 A current can be passed through it. In order to change it into an ammeter of range 10 A, the shunt resistance required is
	In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance is
	A galvanometer has 30 divisions and a sensitivity 16$\mu A/{\rm{div}}{\rm{.}}$It can be converted into a voltmeter to read 3 V by connecting
	Voltmeters V1 and V2 are connected in series across a D.C. line. V1 reads 80 volts and has a per volt resistance of 200 ohms. V2 has a total resistance of 32 kilo ohms. The line voltage is

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