In the given figure, when key K is opened, the reading of the ammeter A will be

(1) 50 A

(2) 2 A

(3) 0.5 A

(4) 109A

Concept Questions :-

Combination of resistors
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In the given circuit, the potential of the point E is 

(1) Zero

(2) –8 V

(3) –4/3 V

(4) 4/3 V

Concept Questions :-

Kirchoff's voltage law
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If a resistance R2 is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of R2 will be

(1) I3,R

(2) I,2R

(3) I3,R

(4) I2,R

Concept Questions :-

Kirchoff's voltage law
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A battery of e.m.f. 10 V is connected to resistance as shown in figure. The potential difference VAVB  between the points A and B is 

(1) –2 V

(2) 2 V

(3) 5 V

(4) 2011V

Concept Questions :-

Combination of resistors
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A student has 10 resistors of resistance ‘r’. The minimum resistance made by him from given resistors is :

(1) 10 r

(2) r10

(3) r100

(4) r5

Concept Questions :-

Combination of resistors
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Two wires of same metal have the same length but their cross-sections are in the ratio 3 : 1. They are joined in series. The resistance of the thicker wire is 10 Ω. The total resistance of the combination will be 

(1) 40 Ω

(2) 403Ω

(3) 52Ω  

(4) 100 Ω

Concept Questions :-

Combination of resistors
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The equivalent resistance of the following infinite network of resistances is 

(1) Less than 4 Ω

(2) 4 Ω

(3) More than 4 Ω but less than 12 Ω

(4) 12 Ω

Concept Questions :-

Combination of resistors
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In the figure given below, the current passing through 6 Ω resistor is 

(1) 0.40 ampere

(2) 0.48 ampere

(3) 0.72 ampere

(4) 0.80 ampere

Concept Questions :-

Combination of resistors
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Three equal resistances each of value R are joined as shown in the figure. The equivalent resistance between M and N is 

(1) R

(2) 2R

(3) R2

(4) R3

Concept Questions :-

Combination of resistors
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The equivalent resistance between points A and B of an infinite network of resistances each of 1 Ω connected as shown, is 

(1) Infinite

(2) 2 Ω

(3) 1+52Ω

(4) Zero

Concept Questions :-

Combination of resistors
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Difficulty Level: