Questions in Current Electricity

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	In a metre bridge experiment null point is obtained at 20 cm from one end of the wire when resistance X is balanced against another resistance Y. If X
	In the circuit given, the correct relation to a balanced Wheatstone bridge is
	A galvanometer coil of resistance 50 $\Omega$, show full deflection of $100\mu A$. The shunt resistance to be added to the galvanometer, to work as an ammeter of range 10 mA is
	In given figure, the potentiometer wire AB has a resistance of 5 $\Omega$ and length 10 m. The balancing length AM for the emf of 0.4 V is
	A potentiometer consists of a wire of length 4 m and resistance 10 $\Omega$. It is connected to cell of emf 2 V. The potential difference per unit length of the wire will be
	A voltmeter essentially consists of
	In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 $\Omega$, the balancing length becomes 120 cm. The internal resistance of the cell is
	With a potentiometer null point were obtained at 140 cm and 180 cm with cells of emf 1.1 V and one unknown X volts. Unknown emf is
	A moving coil galvanometer of resistance $100 \Omega$ is used as an ammeter using a resistance $0.1 \Omega$. The maximum deflection current in the galvanometer is $100 \mu A$. Find the minimum current in the circuit so that the ammeter shows maximum deflection
	Two resistances are connected in two gaps of a metre bridge. The balance point is 20 cm from the zero end. A resistance of 15 ohms is connected in series with the smaller of the two. The null point shifts to 40 cm. The value of the smaller resistance in ohms is

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