1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |

2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |

1 | For determining the polarity of the voltage drop across a resistor,
it is necessary to know thedirection of current flowing through the resistor.[other wrong options are - value of resistor., value of current., value of emf in the circuit., ] |

2 | Three resistances each of R ω are corrected to form a triangle. The
resistance between any two terminals will be2/3 R ω[other wrong options are - R ω, 3/2 R ω, 3 R ω, ] |

3 | A network consists of linear resistors and ideal voltage source. If
the value of the resistors are doubled, then voltage across each
resistor isnot changed.[other wrong options are - halved., doubled., increased four lines., ] |

4 | How are 500 ω resistors connected so as to give an effective
resistance of 750 ω ?Two resistors of 500 ω each, in parallel and the combination
in series with another 500 ω resistor.[other wrong options are - Three resistors of 500 ω each, in parallel, Three resistors of 500 ω each, in series., Two resistors of 500 ω each, in parallel., ] |

5 | Twelve 1 ω resistance are used as edges to form a cube. The
resistance between two diagonally opposite corners of the cube is6/5 ω[other wrong options are - 5/6 ω, 1 ω, 3/2 ω, ] |

6 | Two resistors R1 and R2 give combined resistance of 4.5 ω when
in series and 1 ω when in parallel, the resistances are1.5 ω and 3 ω[other wrong options are - 2 ω and 2.5 ω, 1 ω and 3.5 ω, 4 ω and 0.5 ω, ] |

7 | Three parallel resistive branches are connected across a dc supply.
What will be the ratio of the branch currents I1 : I2 : I3 if the branch
resistances are in the ratio R1 : R2 : R3 : : 2 : 4 : 6 ?6 : 3 : 2[other wrong options are - 3 : 2 : 6, 2 : 4 : 6, 6 : 2 : 4, ] |

8 | Four resistances 80 ω, 50 ω, 25 ω and R are connected in parallel.
Current through 25 ω resistance is 4 A. Total current of the supply
is 10 A. The value of R will be36.36 ω[other wrong options are - 66.66 ω, 40.25 ω, 76.56 ω, ] |

9 | The temperature coefficient of resistance of an insulator isnegative and dependent on temperature.[other wrong options are - positive and independent oftemperature., negative and independent of temperature., positive and dependent on temperature, ] |

10 | The hot resistance of the filament of a bulb is higher than the cold
resistance because the temperature coefficient of the filament ispositive.[other wrong options are - negative., infinite., zero., ] |

11 | The insulation resistance of a cable of length 10 km is 1 Mega Ohm's. For a length of 100 km of same cable, the insulation resistance will be0.1 Mega Ohm[other wrong options are - 1 Mega Ohm, 10 Mega Ohm, 0.01 Mega Ohm, ] |

12 | Which of the following materials possesses the least specific
resistance?Silver.[other wrong options are - Aluminium., Copper., Iron., ] |

13 | Specific resistance of a conductor depends uponcomposition of conductor material.[other wrong options are - dimensions of the conductor., resistance of the conductor, both (a) and (b)., ] |

14 | If the length of a wire of resistance R is uniformly stretched to n
times its original value, its new resistance isn^{2}R[other wrong options are - n R, R/n, R/n ^{2}, ] |

15 | The temperature coefficient of resistance of a wire is 0.0008°C. If the resistance of the wire is 8 ohm at 0°C, what is the resistance at 100°C?8.64 Ohm.[other wrong options are - 8.08 Ohm., 7.92 Ohm., 7.20 Ohm, ] |

16 | Resistance of a wire always increases ifnumber of free electrons available become less.[other wrong options are - temperature is reduced., temperature is increased., number of free electrons available become more., ] |

17 | Which of the following statements is correct regarding
resistance?The resistance of a conductor is the hindrance by which the
conductor opposes the flow of current through it.[other wrong options are - The resistance of wire is independent of the temperature for most of the materials, The resistance of a wire does not depend upon its material., None of the above., ] |

18 | Temperature co-efficient of resistance
is expressed in terms ofohms/ohm°C[other wrong options are - obms/°C, mhos/ohm°C, mhos/°C, ] |

19 | The resistance of a few metres of wire
conductor in closed electrical circuit is
(a) practically zero (b) lowpractically zero[other wrong options are - low, high, very high, ] |

20 | The resistance of a parallel circuit consisting
of two branches is 12 ohms. 1f
the resistance of one branch is 18 ohms,
what is the resistance of the other?36 ω[other wrong options are - 18 ω, 48 ω, 64 ω, ] |

Or |

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