A wire has a resistance of 6 Ω. It is cut into two parts and both half values are connected in parallel. The new resistance is :

(1) 12 Ω

(2) 1.5 Ω

(3) 3 Ω

(4) 6 Ω

Subtopic:  Combination of Resistors |
 87%
From NCERT
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Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between

(1) P and Q

(2) Q and R

(3) P and R

(4) Any two points

Subtopic:  Combination of Resistors |
 82%
From NCERT
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The total current supplied to the circuit by the battery is:

         

1. \(1~\text{A}\)
2. \(2~\text{A}\)
3. \(4~\text{A}\)
4. \(6~\text{A}\)

Subtopic:  Combination of Resistors |
 65%
From NCERT
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An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii of the wires are in the ratio of 4/3 and 2/3, then the ratio of the currents passing through the wire will be 

(1) 3

(2) 1/3

(3) 8/9

(4) 2

Subtopic:  Combination of Resistors |
 69%
From NCERT
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In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to \(3\) volt. The voltage across the resistance \(R_4\) is:

            

1. \(0.4\) V
2. \(0.6\) V
3. \(1.2\) V
4. \(1.5\) V

Subtopic:  Kirchoff's Voltage Law |
 59%
From NCERT
PMT - 2004
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If you are provided three resistances 2 Ω, 3 Ω and 6 Ω. How will you connect them so as to obtain the equivalent resistance of 4 Ω 

(1)

(2)

(3)

(4) None of these

Subtopic:  Combination of Resistors |
 88%
From NCERT
PMT - 2003
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The equivalent resistance and potential difference between A and B for the circuit is respectively 

(1) 4 Ω, 8 V

(2) 8 Ω, 4 V

(3) 2 Ω, 2 V

(4) 16 Ω, 8 V

Subtopic:  Combination of Resistors |
 90%
From NCERT
PMT - 2003
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Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be 

(1) 3VR

(2) VR

(3) V2R

(4) 2VR

Subtopic:  Combination of Resistors |
From NCERT
PMT - 2004
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For the network shown in the figure the value of the current i is 

(1) 9V35

(2) 5V18

(3) 5V9

(4) 18V5

Subtopic:  Wheatstone Bridge |
 79%
From NCERT
PMT - 2005
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When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, the resistance between any two of diametrically opposite points will be :

(1) R4

(2) R8

(3) 4R

(4) R2 

Subtopic:  Combination of Resistors |
 70%
From NCERT
PMT - 2005
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