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Q1. | The example of non-ohmic resistance is |

A. | Copper wire [Wrong Answer] |

B. | Carbon resistance [Wrong Answer] |

C. | Diode [Correct Answer] |

D. | Tungsten wire [Wrong Answer] |

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

⇒ 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?

18 ω

36 ω

48 ω

64 ω

⇒ The temperature-coefficient of resistance of conductors is

Positive

Negative

Neutral

First A then C

⇒ 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}

^{1}/

_{n}

⇒ 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.

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

has lower wattage rating

has higher wattage rating

has large number of turns

offers large number of tappings

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

Copper

Aluminium

Iron

Gennanium

⇒ 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.

8.08 Ohm.

7.92 Ohm.

7.20 Ohm

⇒ The resistance of a straight conductor does not depend upon its

Shape of cross-section

Temperature

Material

Length

⇒ In a circuit containing two unequal resistors connected in parallel

The current is same in both the resistors

The current is larger in larger resistance

The voltage drop is same across both the resistances

The voltage drop is larger across larger resistances

⇒ Which of tite following materials has the least resistivity?

Zinc

Lead

Mercury

Copper

⇒ Specific resistance of a conductor depends upon

dimensions of the conductor.

composition of conductor material.

resistance of the conductor

both (a) and (b).

⇒ A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is

6.4 A, 6.9 A

6.4 A, 9.6 A

4.6A, 6.9A

4.6A,9.6A

⇒ Conductance is reciprocal of

resistance

inductance

reluctance

capacitance

⇒ A closed switch has a resistance of

zero

about 50 ohms

about 500 ohms

infinity

⇒ Resistance of a material always decreases if

temperature of material is decreased

temperature of material is increased

number of free electrons available become more

none of the above is correct

⇒ 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

⇒ Which of the following quantities remain the same in all parts of a series circuit?

Voltage

Current

Power

Resistance

⇒ Twelve 1 ω resistance are used as edges to form a cube. The resistance between two diagonally opposite corners of the cube is

5/6 ω

1 ω

6/5 ω

3/2 ω

⇒ Two resistors are said to be connected in series when

same current passes in turn through both

both carry the same value of current

total current equals the sum of branch currents

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

⇒ With rise in temperature the resistance of pure metals

increases

decreases

first increases and then decreases

remains constant

⇒ Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be

160 ohms

80 ohms

20 ohms

10 ohms

⇒ Reciprocal of specific resistance is

Conductive resistance

Specific conductance

Conductive reactance

Plate resistance

⇒ Which resistor will be physically larger in size?

100ω, 10W

10ω, 50W

1Mω, 1/2W

1kω, 1W

⇒ In a circuit a 33 ω resistor carries a current of 2 A. The voltage across the resistor is

33V

66V

80 V

132V

⇒ You have to replace 1500 ω resistor in radio. You have no 1500 ω resistor but have several 1000 ω ones which you would connect

two in parallel

two in parallel and one in series

three in parallel

three in series

⇒ 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

⇒ 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

1 ω

2 ω

3 ω

4 ω

⇒ Voliage dependent resistors are used

for inductive circuits

to supress surges

as heating elements

as current stabilizers

⇒ Two resistors R1 and R2 give combined resistance of 4.5 ω when in series and 1 ω when in parallel, the resistances are

2 ω and 2.5 ω

1 ω and 3.5 ω

1.5 ω and 3 ω

4 ω and 0.5 ω

⇒ The resistance of a conductor varies inversely as

length

area of cross-section

temperature

resistivity