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Q1. | Which of the following is an ohmic conductor? |

A. | Transistors [Wrong Answer] |

B. | Thermionic valves [Wrong Answer] |

C. | Constanton [Correct Answer] |

D. | Electrolyte [Wrong Answer] |

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

⇒ 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

⇒ Which resistor will be physically larger in size?

100ω, 10W

10ω, 50W

1Mω, 1/2W

1kω, 1W

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

Shape of cross-section

Temperature

Material

Length

⇒ The hot resistance of the filament of a bulb is higher than the cold resistance because the temperature coefficient of the filament is

negative.

infinite.

zero.

positive.

⇒ 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

⇒ Three resistances each of R Ω are corrected to form a triangle. The resistance between any two terminals will be

R Ω

3/2 R Ω

3 R Ω

2/3 R Ω

⇒ The example of non-ohmic resistance is

Copper wire

Carbon resistance

Diode

Tungsten wire

⇒ With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals

10 W

20 W

40 W

60 W

⇒ 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

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

33V

66V

80 V

132V

⇒ 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

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

2 watts

4 watts

6 watts

8 watts

⇒ 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 ?

3 : 2 : 6

2 : 4 : 6

6 : 3 : 2

6 : 2 : 4

⇒ Which of the following is an ohmic conductor?

Transistors

Thermionic valves

Constanton

Electrolyte

⇒ Voltage dependent resistors are usually made from

charcoal

silicon carbide

nichrome

graphite

⇒ Temperature co-efficient of resistance is expressed in terms of

obms/°C

mhos/ohm°C

ohms/ohm°C

mhos/°C

⇒ 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

⇒ An open resistor, when checked with an ohm-meter reads

zero

infinite

high but within tolerance

low but not zero

⇒ The specific resistance of a wire depends upon

Its length

Its cross-sectional area

Its dimensions

Its material

⇒ The specific resistance of all metals is most affected by

Temperature

Pressure

Degree of illumination

Applied magnetic field

⇒ 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

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

5 ohms

10 ohms

15 ohms

55 ohms

⇒ Reciprocal of specific resistance is

Conductive resistance

Specific conductance

Conductive reactance

Plate resistance

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

Voltage

Current

Power

Resistance

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

Carbon

Germanium

Electrolyte

Aluminium

⇒ Voliage dependent resistors are used

for inductive circuits

to supress surges

as heating elements

as current stabilizers

⇒ How are 500 ω resistors connected so as to give an effective resistance of 750 ω ?

Three resistors of 500 ω each, in parallel

Three resistors of 500 ω each, in series.

Two resistors of 500 ω each, in parallel.

Two resistors of 500 ω each, in parallel and the combination in series with another 500 ω resistor.

⇒ In a series circuit with unequal resistances

In a series circuit with unequal resistances

the lowest resistance has the highest voltage drop

the lowest resistance has the highest current

the highest resistance has the highest voltage drop

⇒ Specific resistance of a conductor depends upon

dimensions of the conductor.

composition of conductor material.

resistance of the conductor

both (a) and (b).

⇒ 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 be

66.66 ω

40.25 ω

36.36 ω

76.56 ω