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In the circuit shown in the figure below, the current supplied by the battery is:

1. \(2\) A

2. \(1\) A

3. \(0.5\) A

4. \(0.4\) A

Subtopic: Wheatstone Bridge |

88%

From NCERT

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The figure below shows a network of currents. The current *\(i\)* will be:

1. \(3~\text{A}\)

2. \(13~\text{A}\)

3. \(23~\text{A}\)

4. \(-3~\text{A}\)

Subtopic: Kirchoff's Current Law |

85%

From NCERT

PMT - 1995

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A battery of internal resistance \(r\), when connected across \(2~\Omega\) resistor supplies a current of \(4~\text{A}\). When the battery is connected across a \(5~\Omega\) resistor, it supplies a current of \(2~\text{A}\). The value of \(r\) is:

1. | \(2~\Omega\) | 2 | \(1~\Omega\) |

3. | \(0.5~\Omega\) | 4. | zero |

Subtopic: EMF & Terminal Voltage |

83%

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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%

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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: Heating Effects of Current |

61%

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What is the reading of the voltmeter of resistance \(1200~\Omega\) connected in the following circuit diagram?

1. | \(2.5\) V | 2. | \(5.0\) V |

3. | \(7.5\) V | 4. | \(40\) V |

Subtopic: Combination of Resistors |

67%

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The dependence of resistivity \((\rho)\) on the temperature \((T)\) of a semiconductor is, roughly, represented by:

1. | 2. | ||

3. | 4. |

Subtopic: Derivation of Ohm's Law |

64%

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Current through the \(2~\Omega\)$$ resistance in the electrical network shown is:

1. | zero | 2. | \(1\) A |

3. | \(3\) A | 4. | \(5\) A |

Subtopic: Grouping of Cells |

77%

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Two batteries, one of emf \(18~\text{V}\) and internal resistance \(2~\Omega\) and the other of emf \(12\) V and internal resistance \(1~\Omega\), are connected as shown. Reading of the voltmeter is:

(if voltmeter is ideal)

1. \(14\) V

2. \(15\) V

3. \(18\) V

4. \(30\) V

Subtopic: Grouping of Cells |

78%

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The metre bridge shown is in a balanced position with \(\frac{P}{Q} = \frac{l_1}{l_2}\). If we now interchange the position of the galvanometer and the cell, will the bridge work? If yes, what will be the balanced condition?

1. Yes, \(\frac{P}{Q}=\frac{l_1-l_2}{l_1+l_2}\)

2. No, no null point

3. Yes, \(\frac{P}{Q}= \frac{l_2}{l_1}\)

4. Yes, \(\frac{P}{Q}= \frac{l_1}{l_2}\)

Subtopic: Meter Bridge & Potentiometer |

62%

From NCERT

NEET - 2019

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