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Q1. | When the temperature of metallic conductor is increased, its resistance |

A. | Always decreases [Wrong Answer] |

B. | Always increases [Correct Answer] |

C. | May increase or decrease [Wrong Answer] |

D. | Remains the same [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ A 3 ω resistor having 2 A current will dissipate the power of

2 watts

4 watts

6 watts

8 watts

⇒ The resistance of two wires is 25 ω when connected in series and 6 ω when joined in parallel. The resistance of each wire is

10 ω, 15 ω

20 ω, 30 ω

5 ω, 10 ω

10 ω, 20 ω

⇒ Heat in a conductor is produced on the passage of electric current due to

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capacitance

impedance

resistance

⇒ A thermistor has

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negative temperature coefficient

zero temperature coefficient

variable temperature coefficient

⇒ Which resistor will be physically larger in size?

100ω, 10W

10ω, 50W

1Mω, 1/2W

1kω, 1W

⇒ Reciprocal of specific resistance is

Conductive resistance

Specific conductance

Conductive reactance

Plate resistance

⇒ A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is

400 ω

600 ω

800 ω

1000 ω

⇒ The temperature coefficient of resistance of some material is negative. The material is

Copper

Aluminium

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Gennanium

⇒ The temperature coefficient of resistance of an insulator is

positive and independent oftemperature.

negative and independent of temperature.

negative and dependent on temperature.

positive and dependent on temperature

⇒ For which of the following substances the temperature co-efficient of resistivity is positive ?

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⇒ Two resistors are said to be connected in series when

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total current equals the sum of branch currents

sum of IR drops equals the applied e.m.f.

⇒ Which of the following materials possesses the least specific resistance?

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⇒ Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 0.25 ω. If the same four wires are connected is series the effective resistance will be

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The resistance of a conductor is the hindrance by which the conductor opposes the flow of current through it.

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.

⇒ A rheostat differs from potentiometer in the respect that it

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⇒ Resistance of a wire always increases if

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temperature is increased.

number of free electrons available become less.

number of free electrons available become more.

⇒ N equal resistances are first connected in series and then connected in parallel. What is the ratio of the maximum to the minimum resistance ?

n

^{ 1 }^{n2}

n

^{2}

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⇒ Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel. The total resistance of the combination is

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⇒ Specific resistance of a conductor depends upon

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composition of conductor material.

resistance of the conductor

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64 ω

⇒ Two resistances R1 and R2 are connected in series across the voltage source where R2 > R1. The largest drop will be across

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