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3 years ago

9

Does the light bulb filament appear to have a constant resistance (constant ratio of voltage to current)?

2 answers:

Leviafan [203]3 years ago

6 0

Answer:

No...The resistance of the filament isn't constant

Explanation:

It is because the filament to light up the resistance is always constantly increasing that will ultimately causes increase in the temperature of filament and eventually it lights up. The resistance always keep on increasing as the current in the filament is going to increase and vice versa.

NeX [460]3 years ago

5 0

Answer:

Does the light bulb filament appear to have a constant resistance (constant ratio of voltage to current)?

The Answer is "NO"

The light bulb filament does not have a constant resistance.

Explanation:

Resistance is one of the basic principles of Ohm’s law, resistance is the opposition to current caused by a resistor. The opposition is towards the flow of electric current. The value of resistance of a conductor depends upon: The thickness, the material from which the conductor is made, the temperature at which it operates, and, the length of the conductor.

The filament is the part of the light bulb that produces light. Filaments is a thin tungsten wire in the light bulb which resists the flow of electrons. Filament heats up when an electric current passes through it, and produces light as a result.

The resistance of the filament is not constant, rather, it increases with increased current. If extreme currents are applied to wires, they heat up, change their resistances, in turn, the resistance of a lamp increases as the temperature, and, as the current in a circuit goes up, the voltage goes up too. The relationship between the current flowing through a filament lamp and the voltage across it is not directly proportional.

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If the absolute temperature of a gas is 600 K, the temperature in degrees Celsius is

gavmur [86]

Kelvin is a base unit of temperature scale from SI that defines as zero degree Kelvin (absolute zero). The absolute zero is a hypothetical statement that all molecular movement stops because there is no transient of energy for the molecules to move. When converting temperature in degree Celsius to Kelvin, add 273. You are given 600K and you are asked to find it in degrees Celsius.

T(K) = T(C) + 273
600 K = T(C) + 273
T(C) = 600 – 273
T(C) = 327 °C
<span>The answer is letter B.</span>

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3 years ago

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Which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68 m?

lys-0071 [83]

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3 years ago

The shortest path from a starting point to an endpoint, regardless of the path

liubo4ka [24]

Answer:

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3 years ago

What is the displacement if I walk three blocks east two blocks south one block west and two blocks north

vladimir1956 [14]

Answer:

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Explanation:

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3 years ago

When he reaches the bottom, 4.2 m below his starting point, his speed is 2.2 m/s . By how much has thermal energy increased duri

Advocard [28]

Complete question:

A fireman of mass 80 kg slides down a pole. When he reaches the bottom, 4.2 m below his starting point, his speed is 2.2 m/s. By how much has thermal energy increased during his slide?

Answer:

The thermal energy increased by 3,099.2 J

Explanation:

Given;

mass of the fireman, m = 80 kg

initial position of the fireman, hi = 4.2 m

final speed, v = 2.2 m/s

The change in the thermal energy is calculated as;

ΔE + (K.Ef - K.Ei) + (Uf - Ui) = 0

where;

ΔE is the change in the thermal energy

K.Ef is the final kinetic energy

K.Ei is the initial kinetic energy

Uf is the final potential energy

Ui is the initial potential energy

$\Delta E_{th} + (\frac{1}{2} mv_f^2 - \frac{1}{2} mv_i^2) + (mgh_f - mgh_i)=0\\\\initial \ velocity, \ v_i = 0\\final \ height , \ h_f = o\\\\\Delta E_{th} + (\frac{1}{2} mv_f^2) + ( - mgh_i)=0\\\\\Delta E_{th} + \frac{1}{2} mv_f^2 - mgh_i = 0\\\\\Delta E_{th} =mgh_i - \frac{1}{2} mv_f^2\\\\\Delta E_{th} = 80 \times 9.8 \times 4.2 \ \ - \ \ \frac{1}{2} \times 80 \times (2.2)^2 \\\\\Delta E_{th} = 3292.8 \ J \ - \ 193.6 \ J\\\\\Delta E_{th} = 3,099.2 \ J$

3 0

3 years ago