In the circuit given E = 6.0 V, R1 = 100 ohms, R2 = R3 = 50 ohms, R4 = 75 ohms. The equivalent resistance of the circuit, in ohms, is 

(1) 11.875

(2) 26.31

(3) 118.75

(4) None of these

Concept Questions :-

Combination of resistors
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By using only two resistance coils-singly, in series, or in parallel one should be able to obtain resistances of 3, 4, 12, and 16 ohms. The separate resistances of the coil are :

(1) 3 and 4

(2) 4 and 12

(3) 12 and 16

(4) 16 and 3

Concept Questions :-

Combination of resistors
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In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms is :

(1) 200

(2) 100

(3) 10

(4) 50

Concept Questions :-

Kirchoff's voltage law
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In the adjoining circuit, the battery E1 has an e.m.f. of 12 volts and zero internal resistance while the battery E has an e.m.f. of 2 volts. If the galvanometer G reads zero, then the value of the resistance X in ohm is 

(1) 10

(2) 100

(3) 500

(4) 200

Concept Questions :-

Grouping of cells
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The magnitude and direction of the current in the circuit shown will be 

(1) 73A from a to b through e

(2) 73A from b to a through e

(3) 1A from b to a through e

(4) 1A from a to b through e

Concept Questions :-

Grouping of cells
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The e.m.f. of a cell is E volts and internal resistance is r ohm. The resistance in external circuit is also r ohm. The p.d. across the cell will be 

(1) E/2

(2) 2E

(3) 4E

(4) E/4

Concept Questions :-

Emf and terminal voltage
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Kirchhoff's first law i.e. Σi=0 at a junction is based on the law of conservation of :

(1) Charge

(2) Energy

(3) Momentum

(4) Angular momentum

Concept Questions :-

Kirchoff's current law
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The figure below shows currents in a part of electric circuit. The current i is

(1) 1.7 amp

(2) 3.7 amp

(3) 1.3 amp

(4) 1 amp

Concept Questions :-

Kirchoff's current law
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In the circuit shown, A and V are ideal ammeter and voltmeter respectively. Reading of the voltmeter will be

(1) 2 V

(2) 1 V

(3) 0.5 V

(4) Zero

Concept Questions :-

Kirchoff's voltage law
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The terminal potential difference of a cell when short-circuited is (E = E.M.F. of the cell)

(1) E

(2) E/2

(3) Zero

(4) E/3

Concept Questions :-

Emf and terminal voltage
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Difficulty Level: