If there are two bulbs of (\(40~\text{W},200~\text{V}\)), and (\(100~\text{W},200~\text{V}\)), then the correct relation for their resistance is:
1. \(R_{40}<R_{100}\)
2. \(R_{40}>R_{100}\)
3. \(R_{40}=R_{100}\)
4. no relation can be predicted

Subtopic:  Heating Effects of Current |
 87%
From NCERT
AIPMT - 2000
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The total power dissipated in watts in the circuit shown below is:

1. \(16\) W 2. \(40\) W
3. \(54\) W 4. \(4\) W
Subtopic:  Heating Effects of Current |
 87%
From NCERT
AIPMT - 2007
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A \(5\text-\)ampere fuse wire can withstand a maximum power of \(1\) watt in a circuit. The resistance of the fuse wire is:

1. \(5~\Omega\) 2. \(0.04~\Omega\)
3. \(0.2~\Omega\) 4. \(0.4~\Omega\)
Subtopic:  Heating Effects of Current |
 86%
From NCERT
AIPMT - 2005
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Two cities are \(150~\text{km}\) apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is \(8\) volts and the average resistance per km is \(0.5~\text{ohm}\). The power loss in the wire is:
1. \(19.2~\text{W}\)
2. \(19.2~\text{kW}\)
3. \(19.2~\text{J}\)
4. \(12.2~\text{kW}\)

Subtopic:  Heating Effects of Current |
 82%
From NCERT
AIPMT - 2014
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A current of \(3~\text{A}\) flows through the \(2~\Omega\) resistor shown in the circuit. The power dissipated in the \(5~\Omega\) resistor is:
    

1. \(4~\text{W}\) 2. \(2~\text{W}\)
3. \(1~\text{W}\) 4. \(5~\text{W}\)
Subtopic:  Heating Effects of Current |
 80%
From NCERT
AIPMT - 2008
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If power dissipated in the \(9~\Omega\) resistor in the circuit shown is \(36\) W, the potential difference across the \(2~\Omega\) resistor will be:

            

1. \(8\) V
2. \(10\) V
3. \(2\) V
4. \(4\) V

Subtopic:  Heating Effects of Current |
 78%
From NCERT
AIPMT - 2011
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If the voltage across a bulb rated \((220~\text{V}\text-100~\text{W})\) drops by \(2.5\%\) of its rated value, the percentage of the rated value by which the power would decrease is:
1. \(20\%\)
2. \(2.5\%\)
3. \(5\%\)
4. \(10\%\)

Subtopic:  Heating Effects of Current |
 77%
From NCERT
AIPMT - 2012
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Power consumed in the given circuit is \(P_1\). On interchanging the position of \(3~\Omega\) and \(12~\Omega\) resistances, the new power consumption is \(P_2\). The ratio of \(\frac{P_2}{P_1}\) is:
     

1. \(2\) 2. \(1 \over 2\)
3. \(3 \over 5\) 4. \(2 \over 5\)
Subtopic:  Heating Effects of Current |
 69%
From NCERT
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The power dissipated across the \(8~\Omega\) resistor in the circuit shown here is \(2~\text{W}\). The power dissipated in watts across the \(3~\Omega\) resistor is:
       

1. \(2.0\) 2. \(1.0\)
3. \(0.5\) 4. \(3.0\)
Subtopic:  Heating Effects of Current |
 69%
From NCERT
AIPMT - 2006
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When three identical bulbs are connected in series, the consumed power is \(10\) W. If they are now connected in parallel then the consumed power will be:
1. \(30\) W
2. \(90\) W
3. \(\frac{10}{3}\) W
4. \(270\) W

Subtopic:  Heating Effects of Current |
 67%
From NCERT
AIPMT - 1998
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