MEDIUM
JEE Main
IMPORTANT
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A cell of internal resistance drives current through an external resistance The power delivered by the cell to the external resistance will be maximum when:
(a)
(b)
(c)
(d)

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Important Questions on Current Electricity
EASY
JEE Main
IMPORTANT
In the figure shown, what is the current (in ampere) drawn from the battery? You are given:

MEDIUM
JEE Main
IMPORTANT
A current of passes through a copper conductor (resistivity ) of radius of cross-section . Find the mobility of the charges if their drift velocity is .

MEDIUM
JEE Main
IMPORTANT
In the given circuit, an ideal voltmeter connected across the resistance reads . The internal resistance , of each cell is:

MEDIUM
JEE Main
IMPORTANT
In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure.

S. No. | ||
---|---|---|
1. 2. 3. 4. |
Which of the reading is inconsistent?

MEDIUM
JEE Main
IMPORTANT
In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown in the figure, it is a straight line.
One may conclude that

MEDIUM
JEE Main
IMPORTANT
Space between two concentric conducting spheres of radii and is filled with a medium of resistivity . The resistance between the two spheres will be:

MEDIUM
JEE Main
IMPORTANT
A potentiometer wire having length and resistance is joined to a cell of emf and internal resistance . A cell having EMF and internal resistance is connected. The length , at which the galvanometer, as shown in the figure, shows no deflection is


MEDIUM
JEE Main
IMPORTANT
In the given circuit the cells have zero internal resistance. The currents (in amperes) passing through resistance and respectively, are:

