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Find the equivalent resistance between A and B.

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Important Questions on Current Electricity

EASY
A battery of 3.0 V is connected to a resistor dissipating 0.5 W of power. If the terminal voltage of the battery is 2.5 V, the power dissipated within the internal resistance is:
EASY
Two cities are 150 km apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is 8 volts and the average resistance per km is 0.5 Ω. The power loss in the wire is:
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In the given circuit, the current through 2 Ω resistor is

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HARD

Each resistance in the given cubical network has resistance of 1Ω and equivalent resistance between A and B is

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Equivalent resistance between points A and B in the adjacent circuit is

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EASY

The current in the 1 Ω resistor shown in the circuit is,

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The current I1 (in A ) flowing through 1Ω resistor in the following circuit is:
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EASY

A dc source with internal resistance R0 is connected to three identical resistors each of resistance R as shown in the figure. If the thermal power generated in the circuit is highest, then

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EASY

Six similar bulbs are connected as shown in the figure with a DC source of emf E, and zero internal resistance.
The ratio of power consumption by the bulbs when i all are glowing and ii in the situation when two from section A and one from section B are glowing will be, 
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EASY
A wire of resistance R is bent to form a square ABCD as shown in the figure. The effective resistance between E and C is:
( E is mid-point of arm CD )
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MEDIUM
Two wires of equal diameters, lengths l1,l2 and having resistivities S1,S2 respectively are joined in series. The equivalent resistivity of the combination is ____
HARD
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A 9 V battery with an internal resistance of 0.5 Ω is connected across an infinite network, as shown in the figure. All ammeters A1, A2, A3 and voltmeter V are ideal.
Choose the correct statement.
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Thirteen resistors each of resistance R are connected in the circuit as shown in the following figure. Net resistance between A and B is

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MEDIUM

The equivalent resistance between A and B for the mesh shown in the figure is

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A and B are two points on a uniform ring of resistance 19 Ω. The angle AOB=45°. The equivalent resistance between A and B is

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HARD

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What will be the equivalent resistance between the terminals A and B of the infinite resistive network shown in the figure ?

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Four resistors, 100 Ω, 200 Ω, 300 Ω and 400 Ω are connected to form four sides of a square. The resistors can be connected in any order. What is the maximum possible equivalent resistance across the diagonal of the square?
HARD
A metal wire of resistance 3Ω is elongated to make a uniform wire of double its previous length. This new wire is now bent and the ends joined to make a circle. If two points on this circle make an angle 60o at the center, the equivalent resistance between these two points will be:
HARD
The figure shows three circuits I, II and III which are connected to a 3 V battery. If the powers dissipated by the configurations I, II and III are P1, P2 and P3 respectively, then -

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EASY
A uniform metallic wire has a resistance of 18 Ω and is bent into an equilateral triangle. Then, the resistance between any two vertices of the triangle is: