When three identical bulbs are connected in series, the consumed power is 1010 W. If they are now connected in parallel then the consumed power will be:
1. 3030 W
2. 9090 W
3. 103103 W
4. 270270 W

Subtopic:  Heating Effects of Current |
 69%
From NCERT
AIPMT - 1998
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In a hot wire ammeter due to the flowing of the current, the temperature of the wire is increased by 55 C. If the value of the current is doubled, then the increase in temperature will be:
1. 1515 C
2. 2020 C
3. 2525 C
4. 3030 C

Subtopic:  Heating Effects of Current |
 69%
From NCERT
AIPMT - 1998
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The current in 8 Ω8 Ω resistance is (in the figure below):

   

1. 0.690.69 A
2. 0.920.92 A
3. 1.301.30 A
4. 1.61.6 A

Subtopic:  Kirchoff's Voltage Law |
 57%
From NCERT
AIPMT - 1999
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If the power dissipated in 5 Ω5 Ω is 2020 W then the power dissipated in 4 Ω4 Ω is:
   
1. 44 W
2. 66 W
3. 1010
4. 2020 W

Subtopic:  Heating Effects of Current |
 76%
From NCERT
AIPMT - 1999
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The value of RR for which power in it is maximum is:    
   
1. 3 Ω3 Ω
2. 6 Ω6 Ω
3. 12 Ω12 Ω
4. 9 Ω9 Ω

Subtopic:  Heating Effects of Current |
 77%
From NCERT
AIPMT - 1999
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The terminal potential difference of a cell is greater than its emf when:

1. A battery of less emf is connected in its series.
2. A battery of higher emf is connected in its series.
3. A battery of higher emf is connected in its parallel.
4. A battery of less emf is connected in its parallel.
Subtopic:  EMF & Terminal Voltage |
From NCERT
AIPMT - 1999
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The net resistance of the circuit between AA and BB is:

          
1. 83 Ω83 Ω

2. 143 Ω143 Ω

3. 163 Ω163 Ω

4. 223 Ω

Subtopic:  Wheatstone Bridge |
 90%
From NCERT
AIPMT - 2000
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A car battery of emf 12 V and internal resistance 5×102 Ω receives a current of 60 A from an external source. The terminal voltage of the battery is:

1. 12 V 2. 9 V
3. 15 V 4. 20 V
Subtopic:  EMF & Terminal Voltage |
 53%
From NCERT
AIPMT - 2000
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If there are two bulbs of (40 W,200 V), and (100 W,200 V), then the correct relation for their resistance is:
1. R40<R100
2. R40>R100
3. R40=R100
4. no relation can be predicted

Subtopic:  Heating Effects of Current |
 88%
From NCERT
AIPMT - 2000
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According to the Faraday Law of electrolysis, the mass deposited at electrode will be proportional to:

1. m ∝ I2

2. m ∝ Q

3. m ∝ Q2

4. 'm' does not depend on Q

Subtopic:  Current & Current Density |
 74%
From NCERT
AIPMT - 2000
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