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 87%

From NCERT

AIPMT - 2005

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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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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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For the given circuit, the value of the resistance in which the maximum heat is produced is:

1. \(2~\Omega\)

2. \(6~\Omega\)

3. \(4~\Omega\)

4. \(12~\Omega\)$$

Subtopic: Â Heating Effects of Current |

Â 63%

From NCERT

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The charge flowing through a resistance \(R\) varies with time \(t\) as \(Q=at-bt^2,\) where \(a\) and \(b\) are positive constants. The total heat produced in \(R\) is:

1. | \(\dfrac{a^3R}{3b}\) | 2. | \(\dfrac{a^3R}{2b}\) |

3. | \(\dfrac{a^3R}{b}\) | 4. | \(\dfrac{a^3R}{6b}\) |

Subtopic: Â Heating Effects of Current |

Â 56%

From NCERT

NEET - 2016

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A coil heating a bucket full of water raises the temperature by \(5^{\circ}\text{C}\) in \(2\) min. lf the current in the coil is doubled, what will be the change in the temperature of water in \(1\) min? (Assume no loss of heat to the surroundings)

1. | \(10^{\circ}\text{C}\) | 2. | \(5^{\circ}\text{C}\) |

3. | \(20^{\circ}\text{C}\) | 4. | \(15^{\circ}\text{C}\) |

Subtopic: Â Heating Effects of Current |

Â 61%

From NCERT

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