Questions in Current Electricity

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	Which is a wrong statement
	A voltmeter having a resistance of 998 ohms is connected to a cell of e.m.f. 2 volt and internal resistance 2 ohm. The error in the measurement of e.m.f. will be
	For comparing the e.m.f.'s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful
	Which of the following is correct
	An ammeter with internal resistance $90\,\Omega $ reads 1.85 A when connected in a circuit containing a battery and two resistors 700$\Omega $ and $410\,\Omega $ in series. Actual current will be
	AB is a wire of uniform resistance. The galvanometer G shows no current when the length AC = 20cm and CB = 80 cm. The resistance R is equal to
	The circuit shown here is used to compare the e.m.f. of two cells ${E_1}$ and ${E_2}({E_1} > {E_2})$. The null point is at C when the galvanometer is connected to ${E_1}$. When the galvanometer is connected to ${E_2}$, the null point will be
	In an experiment to measure the internal resistance of a cell by potentiometer, it is found that the balance point is at a length of 2m when the cell is shunted by a $5\,\Omega $ resistance; and is at a length of 3m when the cell is shunted by a $10\,\Omega $ resistance. The internal resistance of the cell is, then
	A potentiometer circuit shown in the figure is set up to measure e.m.f. of a cell E. As the point P moves from X to Y the galvanometer G shows deflection always in one direction, but the deflection decreases continuously until Y is reached. In order to obtain balance point between X and Y it is necessary to
	In the Wheatstone's bridge (shown in figure) $X = Y$ and $A > B$. The direction of the current between ab will be

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