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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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In a hot wire ammeter due to the flowing of the current, the temperature of the wire is increased by 5° C. If the value of the current is doubled, then the increase in temperature will be:

1. 15° C

2. 20° C

3. 25° C

4. 30° C

Subtopic: Heating Effects of Current |

68%

From NCERT

AIPMT - 1998

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The current in 8 Ω resistance is (in the figure below):

1. 0.69 A

2. 0.92 A

3. 1.30 A

4. 1.6 A

Subtopic: Kirchoff's Voltage Law |

56%

From NCERT

AIPMT - 1999

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If the power dissipated in 5 Ω is 20 W then the power dissipated in 4 Ω is:

1. 4 W

2. 6 W

3. 10 W

4. 20 W

Subtopic: Heating Effects of Current |

74%

From NCERT

AIPMT - 1999

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The value of R for which power in it is maximum is:

1. 3 Ω

2. 6 Ω

3. 12 Ω

4. 9 Ω

Subtopic: Heating Effects of Current |

75%

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 \(A\) and \(B\) is:

1. | \(\frac{8}{3}~\Omega\) | 2. | \(\frac{14}{3}~\Omega\) |

3. | \(\frac{16}{3}~\Omega\) | 4. | \(\frac{22}{3}~\Omega\) |

Subtopic: Wheatstone Bridge |

89%

From NCERT

AIPMT - 2000

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A car battery of emf \(12~\text{V}\) and internal resistance \(5\times 10^{-2}~\Omega\) receives a current of \(60~\text{A}\) from an external source. The terminal voltage of the battery is:

1. | \(12~\text{V}\) | 2. | \(9~\text{V}\) |

3. | \(15~\text{V}\) | 4. | \(20~\text{V}\) |

Subtopic: EMF & Terminal Voltage |

50%

From NCERT

AIPMT - 2000

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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. | _{\(\mathrm{R}_{40}<\mathrm{R}_{100}\)} |

2. | _{\(\mathrm{R}_{40}>\mathrm{R}_{100}\)} |

3. | _{\(\mathrm{R}_{40}=\mathrm{R}_{100}\)} |

4. | no relation can be predicted |

Subtopic: Heating Effects of Current |

87%

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 ∝ I^{2}

2. m ∝ Q

3. m ∝ Q^{2}

4. 'm' does not depend on Q

Subtopic: Current & Current Density |

72%

From NCERT

AIPMT - 2000

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