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1. \(3~\Omega\)

2. \(6~\Omega\)

3. \(12~\Omega\)

4. \(9~\Omega\)

Subtopic: Heating Effects of Current |

76%

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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In India electricity is supplied for domestic use at \(220\) V. It is supplied at \(110\) V in the USA. If the resistance of a \(60\) W bulb for use in India is \(R\), the resistance of a \(60\) W bulb for use in the USA will be:

1. | \(2R\) | 2. | \(\dfrac{R}{4}\) |

3. | \(\dfrac{R}{2}\) | 4. | \(R\) |

Subtopic: Heating Effects of Current |

81%

From NCERT

AIPMT - 2004

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A battery is charged at a potential of \(15\) V for \(8\) hours when the current flowing is \(10\) A. The battery on discharge supplies a current of \(5\) A for \(15\) hours. The mean terminal voltage during discharges is \(14\) V. The "Watt hour" efficiency of the battery is:

1. \(80\%\)

2. \(90\%\)

3. \(87.5\%\)

4. \(82.5\%\)

Subtopic: EMF & Terminal Voltage |

68%

From NCERT

AIPMT - 2004

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Five equal resistances each of resistance \(R\) are connected as shown in the figure below. A battery of \(V\) volts is connected between \(A\) and \(B\). The current flowing in \(AFCEB\) will be:

1. \(\frac{V}{R}\)

2. \(\frac{V}{2R}\)

3. \(\frac{2V}{R}\)

4. \(\frac{3V}{R}\)

Subtopic: Wheatstone Bridge |

57%

From NCERT

AIPMT - 2004

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A \(6\)-volt battery is connected to the terminals of a three-metre-long wire of uniform thickness and resistance of \(100\) ohms. The difference of potential between two points on the wire separated by a distance of \(50\) cm will be:

1. \(3\) V

2. \(1\) V

3. \(1.5\) V

4. \(2\) V

Subtopic: Derivation of Ohm's Law |

71%

From NCERT

AIPMT - 2004

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The specific resistance of a conductor increases with:

1. | increase in temperature. |

2. | increase in cross-section area. |

3. | increase in cross-section and decrease in length. |

4. | decrease in cross-section area. |

Subtopic: Derivation of Ohm's Law |

79%

From NCERT

AIPMT - 2002

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For a cell, the terminal potential difference is \(2.2\) V when the circuit is open and reduces to \(1.8\) V when the cell is connected to the resistance of \(R = 5~\Omega\). The internal resistance of cell (\(r\)) is:

1. | \(\dfrac{10}{9}~ \Omega\) | 2. | \(\dfrac{9}{10}~ \Omega\) |

3. | \(\dfrac{11}{9}~ \Omega\) | 4. | \(\dfrac{5}{9}~ \Omega\) |

Subtopic: EMF & Terminal Voltage |

72%

From NCERT

AIPMT - 2002

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If the specific resistance of a potentiometer wire is ${10}^{-7}$ $\Omega m$ and the current flow through it is 0.1 A, the cross-sectional area of the wire is ${10}^{-6}$ ${m}^{2}$, then potential gradient will be:

1. ${10}^{-2}$ $V/m$

2. ${10}^{-4}$ $V/m$

3. ${10}^{-6}$ $V/m$

4. ${10}^{-8}$ $V/m$

Subtopic: Meter Bridge & Potentiometer |

77%

From NCERT

AIPMT - 2001

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The resistance of each arm of the wheat stone bridge is \(10~ \Omega.\) A resistance of \(10~ \Omega\) is connected in series with a galvanometer. The equivalent resistance across the battery will be:

1.\(10~ \Omega\)

2.\(15~ \Omega\)

3. \(20~ \Omega\)

4. \(40~ \Omega\)

Subtopic: Wheatstone Bridge |

79%

From NCERT

AIPMT - 2001

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Select Chapter Topics: