Question
In: Physics
a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A...
a) A light bulb has a resistance of 5.0 Ω and a current of 0.4 A when it is connected to a voltage. At what voltage is it operating? (Express your answer to two significant figures.)
b) A piece of copper wire is 1.00 m long and has a diameter of 2.00 mm. Copper has a resistivity of 1.725⋅10−8Ω1.725⋅10−8Ω
Calculate the resistance of this piece of copper wire. (Express your answer to three significant figures.)
Solutions
genius_generous answered 1 month agoRelated Solutions
A circuit contains a 120V battery, and a single light bulb whose resistance is 240 Ω....
A circuit contains a 120V battery, and a single light bulb whose
resistance is 240 Ω.
(A) Determine the power dissipated by the single bulb. Assume 5
additional bulbs, all identical to the first bulb are placed in
parallel with each other and the first bulb.
(B) Determine the power dissipated by each bulb.
(C) If a 6.00 A circuit breaker (CB) is placed in series with
the battery in the circuit with the parallel bulbs, will the CB
trip...
The length of a 60 W, 240 Ω light bulb filament is 60 cm.
The length of a 60 W, 240 Ω light bulb filament is 60 cm.
1.) Remembering that the current in the filament is proportional to the electric field, what is the current in the filament following the doubling of its length?
Express your answer using two significant figures.
2.) What is the resistance of the filament following the doubling of its length?
Express your answer using two significant figures.
The resistance of a 100W light bulb, as measured with the DMM, is 9Ω. Household power...
The resistance of a 100W light bulb, as measured with the DMM,
is 9Ω. Household power is 110V. Using a power equation, how much
power would you expect the light bulb to use? What’s going on here?
Is the light bulb a linear circuit component? If not, what accounts
for its nonlinearity? Which power number is right? Why is the other
power number wrong?
I used P= V2/R = (110)2/9 = 1,344.44W, but
I don't know if I am correct...
A light bulb is connected to a 60-V wall socket. The current in the bulb depends...
A light bulb is connected to a 60-V wall socket. The current in
the bulb depends on the time t according to the relation I = (1.414
A) sin[(282.6 Hz)t].
(a) What is the frequency of the alternating current? Hz
(b) Determine the resistance of the bulb's filament? Ω
(c) What is the average power delivered to the light bulb? W
A 3-phase line has a resistance of 9 Ω/phase and a reactance of 23 Ω/phase. The...
A 3-phase line has a resistance of 9 Ω/phase and a reactance
of 23 Ω/phase. The load at the receiving
end is 130 MW at 0.8 p. f. lagging. Find the capacity of the
synchronous condenser required to
be connected at the receiving end to maintain the voltage at
both ends of the transmission line at
132 KV.
Consider a light bulb connected to a battery with wires. How must the light bulb be...
Consider a light bulb connected to a battery with wires. How
must the light bulb be connected in order for it to light?
Identify the relevant parts of the bulb and battery. Explain,
using the concept of potential difference, why and how your
configuration causes the bulb to light. Do not use the phrase
"complete circuit".
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb...
A light bulb manufacturer guarantees that the mean life of a
certain type of light bulb is at least 720 hours. A random sample
of 51 light bulbs as a mean of 701.6 hours with a population
standard deviation of 62 hours. At an α=0.05, can you support the
company’s claim using the test statistic? claim is the alternative,
reject the null and support claim as test statistic (-2.12) is not
in the rejection region defined by the critical value...
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb...
A light bulb manufacturer guarantees that the mean life of a
certain type of light bulb is at least 757 hours. A random sample
of 22 light bulbs has a mean life of 729 hours. Assume the
population is normally distributed and the population standard
deviation is 65 hours. At a=0.02, do you have enough evidence to
reject the manufacturer's claim.
1. identify null and alternative hypothesis
2.identify region rejections on graph
3.identify standarized test statstics
4. interpret decision
We did a lab studying resistance and Ohm’s Law. In my lab, my light bulb circuit...
We did a lab studying resistance and Ohm’s Law. In my lab, my
light bulb circuit element did not obey Ohm’s law b/c my data did
not convey a proportional relationship between voltage drop and
current. How do I answer:
If either or both of your circuit elements did not obey Ohm’s
Law, can you think of any reasons for the non-ohmic behavior? In
other words what might be happening to one or both of the elements
as the applied...
The resistance of the loop in the figure is 0.30 Ω.
The resistance of the loop in the figure is 0.30 Ω.
a) Is the magnetic field strength increasing or decreasing?
b) At what rate (T/s)?
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