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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 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: Â Heating Effects of Current |

Â 67%

From NCERT

AIPMT - 1998

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