A ring is made of a wire having a resistance of R0=12 Ω.R0=12 Ω.. Find points AA and BB, as shown in the figure, at which a current-carrying conductor should be connected so that the resistance RR of the subcircuit between these points equals 83 Ω83 Ω??

1. l1l2=58l1l2=58 2. l1l2=13l1l2=13
3. l1l2=38l1l2=38 4. l1l2=12l1l2=12

Subtopic:  Combination of Resistors |
 52%
From NCERT
AIPMT - 2012
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If power dissipated in the 9 Ω9 Ω resistor in the circuit shown is 3636 W, the potential difference across the 2 Ω2 Ω resistor will be:

            

1. 88 V
2. 1010 V
3. 22 V
4. 44 V

Subtopic:  Heating Effects of Current |
 79%
From NCERT
AIPMT - 2011
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A current of 2 A2 A flows through a 2 Ω2 Ω resistor when connected across a battery. The same battery supplies a current of 0.5 A0.5 A when connected across a 9 Ω9 Ω resistor. The internal resistance of the battery is:

1. 13 Ω13 Ω 2. 14 Ω14 Ω
3. 1 Ω1 Ω 4. 0.5 Ω0.5 Ω
Subtopic:  EMF & Terminal Voltage |
 79%
From NCERT
AIPMT - 2011
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A potentiometer circuit is set up as shown in the figure below. The potential gradient across the potentiometer wire is k volt/cm. Ammeter present in the circuit reads 1.0 A when the two-way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3, is plugged in, are found to be at lengths l1l1 cmcm and l2l2 cmcm respectively. The magnitudes of the resistors R and X in ohm, are then, respectively, equal to: 
   

1. k(l2-l1)k(l2l1) andand kl2kl2

2. kl1kl1 andand k(l2-l1)k(l2l1)

3. k(l2-l1)k(l2l1) andand kl1kl1

4. kl1kl1 andand kl2kl2

 66%
From NCERT
AIPMT - 2010
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Given below two statements:
Statement I: Kirchhoff’s junction law follows the conservation of charge. 
Statement II: Kirchhoff’s loop law follows the conservation of energy.
 
1. Both Statement I and Statement II are incorrect.
2. Statement I is correct but Statement II is incorrect.
3. Statement I is incorrect and Statement II is correct.
4. Both Statement I and Statement II are correct.
Subtopic:  Kirchoff's Current Law |
 84%
From NCERT
AIPMT - 2010
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A wire of resistance 12 Ωm112 Ωm1 is bent to form a complete circle of radius 10 cm. The resistance between its two diametrically opposite points, A and B as shown in the figure, is:

1. 0.6π Ω 2. 3π Ω
3. 61π Ω 4. 6π Ω
Subtopic:  Combination of Resistors |
 66%
From NCERT
AIPMT - 2009
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A student measures the terminal potential difference V of a cell (of emf E and internal resistance R) as a function of the current I flowing through it. The slope and intercept of the graph between V and I, respectively, is equal to:
1. E and r
2. r and E
3. r and E
4. E and r
Subtopic:  EMF & Terminal Voltage |
 70%
From NCERT
AIPMT - 2009
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See the electrical circuit shown in this figure. Which of the following is a correct equation for it?
                

1. ε1(i1+i2)Ri1r1=0
2. ε2i2r2ε1i1r1=0
3. ε2(i1+i2)R+i2r2=0
4. ε1(i1+i2)R+i1r1=0

Subtopic:  Kirchoff's Voltage Law |
 72%
From NCERT
AIPMT - 2009
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A current of 3 A flows through the 2 Ω resistor shown in the circuit. The power dissipated in the 5 Ω resistor is:
    

1. 4 W 2. 2 W
3. 1 W 4. 5 W
Subtopic:  Heating Effects of Current |
 81%
From NCERT
AIPMT - 2008
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A wire of a certain material is stretched slowly by ten percent, it's new resistance and specific resistance become, respectively:

1. 1.2 times, 1.1 times

2. 1.21 times, same

3. both remain the same

4. 1.1 times, 1.1 times

Subtopic:  Combination of Resistors |
 84%
From NCERT
AIPMT - 2008
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