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Nimfa-mama [501]
2 years ago
12

When does a lightbulb carry more current, (a) immediately after it is turned on and the glow of the metal filament is increasing

on (b) after it has been on for a few milliseconds and the glow is steady?
Physics
1 answer:
emmasim [6.3K]2 years ago
8 0

A  lightbulb carries more current immediately after it is turned on and the glow of the metal filament is increasing; option A.

<h3>What is current?</h3>

Current refers to the flow of electric charges typically electrons.

Current flowing through a metallic material decreases with increase in temperature of the material.

This is because the resistance of the metal increases with increase in temperature.

Therefore, for a light bulb, the current flow through it will be maximum when it is just turned on because the temperature, and hence the resistance of the  filament is at its lowest.

In conclusion, current flow decreases with increase in resistance.

Learn more about current and resistance at: brainly.com/question/24858512

#SPJ4

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The new velocity after 4 s is 40 m/s

The height of the spaceship above the ground after 5 seconds is 1,127.5 m

The given parameters for the first question;

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  • time of motion, t = 4 s

The new velocity after 4 s is calculated as;

v = u + at

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(5)

The given parameters;

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The height of the spaceship above the ground after 5 seconds is calculated as;

h_y = h_0 + ut - \frac{1}{2}gt^2\\\\h_y = 500 + (150\times 5) -  (0.5\times 9.8 \times 5^2)\\\\h_y = 1,127.5 \ m

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