Two non-ideal identical batteries are connected in parallel. Consider the following statements :

(i) The equivalent e.m.f. is smaller than either of the two e.m.f.s

(ii) The equivalent internal resistance is smaller than either of the two internal resistances

(1) Both (i) and (ii) are correct

(2) (i) is correct but (ii) is wrong

(3) (ii) is correct but (i) is wrong

(4) Both (i) and (ii) are wrong

Subtopic:  Grouping of Cells |
 57%
From NCERT
PMT - 1999
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Consider the circuit shown in the figure below. The current \(I_3\) is equal to:

       

1. \(5\) A

2. \(3\) A

3. \(-3\) A

4. \(\frac{-5}{6}\) A

Subtopic:  Kirchoff's Voltage Law |
 66%
From NCERT
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If VAB=4V in the given figure, then resistance X will be:

1. 5 Ω

2. 10 Ω

3. 15 Ω

4. 20 Ω

Subtopic:  Kirchoff's Voltage Law |
 61%
From NCERT
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The number of dry cells, each of e.m.f. 1.5 volt and internal resistance 0.5 ohm that must be joined in series with a resistance of 20 ohms, so as to send a current of 0.6 amperes through the circuit is 

(1) 2

(2) 8

(3) 10

(4) 12

Subtopic:  Grouping of Cells |
 77%
From NCERT
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For driving a current of 2 A for 6 minutes in a circuit, 1000 J of work is to be done. The e.m.f. of the source in the circuit is 

(1) 1.38 V

(2) 1.68 V

(3) 2.04 V

(4) 3.10 V

Subtopic:  Heating Effects of Current |
 76%
From NCERT
PMT - 1999
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Two batteries of e.m.f. 4V and 8 V with internal resistances 1 Ω and 2 Ω are connected in a circuit with a resistance of 9 Ω as shown in figure. The current and potential difference between the points P and Q are 

(1) 13A  and  3V

(2) 16A  and  4V

(3) 19A  and  9V

(4) 12A  and  12V

Subtopic:  Grouping of Cells |
 77%
From NCERT
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Four identical cells each having an electromotive force (e.m.f.) of 12V, are connected in parallel. The resultant electromotive force (e.m.f.) of the combination is :

(1) 48 V

(2) 12 V

(3) 4 V

(4) 3 V

Subtopic:  Grouping of Cells |
 75%
From NCERT
PMT - 1999
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The internal resistance of a cell of e.m.f. 12V is 5×102Ω. It is connected across an unknown resistance. The voltage across the cell, when a current of 60 A is drawn from it, is :

(1) 15 V

(2) 12 V

(3) 9 V

(4) 6 V

Subtopic:  EMF & Terminal Voltage |
 78%
From NCERT
PMT - 2000
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The current in the given circuit is 

(1) 0.1 A

(2) 0.2 A

(3) 0.3 A

(4) 0.4 A

Subtopic:  Kirchoff's Voltage Law |
 62%
From NCERT
AIIMS - 2000
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Consider four circuits shown in the figure below. In which circuit power dissipated is greatest (Neglect the internal resistance of the power supply)

(1)

(2)

(3)

(4)

Subtopic:  Heating Effects of Current |
 63%
From NCERT
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