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23 Nov 2019

A 12 V car battery powers a light bulb. The bulb consumes 60 watts of power. (a) Assuming that the bulb is the only significant source of resistance in the circuit, find its resistance. (b) How much power would be consumed by a light bulb whose resistance was 1.0 Ω less?

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Nestor Rutherford
Nestor RutherfordLv2
4 May 2019
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A 80 W light bulb operates on a potential difference of 75 V.
(a) Find the current in the bulb.
___________ A

(b) Find the resistance of the bulb.
__________ O

(c) If this bulb is replaced with one whose resistance is doublethe value found in part
(b), is its power rating greater than or less than 80?
By what factor?


how much power is dissipated in a light bulb that is normally rated at 75 w

The power rating on a light bulb indicates how much power it would dissipate when it is hooked up to the standard household voltage of 120 V (this rating does not mean that the light bulb always dissipates the same amount of power, assume that the resistance is constant in this case).

A. How much power is dissipated in a light bulb that is normally rated at 75 W, if instead we hook it up to a potential difference of 60 V?

B. How much power is dissipated in a light bulb that is normally rated at 75 W, if instead we hook it up to a potential difference of 120 V?

One lightbulb is marked "29 W 120 V," and another "118 W 120 V";this means that each converts its respective power when pluggedinto a constant 120 V potential difference.

a) find the resistance of each bulb

R29 = ? Ω

R118 = ? Ω

b) how long (s) does it take for 1.00C to pass throughthe dim bulb?

?s

How is this charge different upon its exit from, versus itsentry into, the bulb?
When the charge emerges from the bulb, it has a) lower potentialenergy b) no change in potential energy or c) higher potentialenergy

c)How long (s) does it take for 1.00 J to pass throughthe dim bulb?

?s

How is this energy different upon its exit from, versus itsentry into, the bulb?
Electric potential energy is a) transformed into heat and light b)transformed into heat only c) transformed into light only

d) Find the cost of running the dim bulb continuouslyfor 28.0 daysif the electric company sells its product at $0.0700 perkWh.

?

What physical quantity does the electric companysell?
The electric company sells a) energy b) charge c) reactance d)power

what is its price for one SI unit of this quantity?

? $/Joule


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