Question

Please Answer all 3 completely! Thank you <3

1. In an integrated circuit, the current density in a
2.4-μm-thick × 72-μm-wide gold film is 7.0×10^{5} A/m^2

Part A: How much charge flows through the film in 15 min? Express your answer to two significant figures and include the appropriate units.

2. The current in an electric hair dryer is 10 A . How many electrons flow through the hair dryer in 5.8 min ? Express your answer using two significant figures.

3. How long must a 0.56-mm-diameter aluminum wire be to have a 0.40 A current when connected to the terminals of a 1.5 V flashlight battery? Express your answer to two significant figures and include the appropriate units.

What is the current if the wire is half this length? Express your answer to two significant figures and include the appropriate units.

Answer #1

In an integrated circuit, the current density in a 2.2-μm-thick
× 76-μm-wide gold film is 7.0×105 A/m2 .
Part A How much charge flows through the film in 15 min?

A 14.0-m length of wire consists of 9.0 m of copper followed by
5.0 m of aluminum, both of diameter 1.3 mm . A voltage difference
of 95 mVis placed across the composite wire. The resistivity of
copper is 1.68×10−8Ω⋅m and the resistivity of aluminum is
2.65×10−8Ω⋅m.
1. What is the total resistance (sum) of the two wires?
Express your answer to two significant figures and include the
appropriate units.
2. What is the current through the wire?
Express your...

1. How much does it cost to operate a 120-W lightbulb for 25 min
if the cost of electricity is $0.086 per kilowatt-hour?
2. A 75-V battery supplies 3.9 kW of power. How much current
does the battery produce? Express your answer to two significant
figures and include the appropriate units.
3. A battery connected to a 140-? resistor dissipates 2.5 W of
power. If the circuit contains only the battery and the resistor,
what is the voltage of the...

The wires leading to and from a 0.12-mm-diameter lightbulb
filament are 1.5 mm in diameter. The wire to the filament carries a
current with a current density of 4.1×105 A/m2
a. What is the current in the filament?
Express your answer to two significant figures and include the
appropriate units.
b.What is the current density in the filament?
Express your answer to two significant figures and include the
appropriate units.

1. The current in a 100 watt lightbulb is 0.760 A . The filament
inside the bulb is 0.170 mm in diameter.
a. What is the current density in the filament?
Express your answer to three significant figures and
include the appropriate units.
b. What is the electron current in the filament?
Express your answer using three significant
figures.
_____________
2. Wires 1 and 2 are made of the same metal. Wire 2 has twice
the length and twice the...

The wires leading to and from a 0.12-mm-diameter lightbulb
filament are 1.5 mm in diameter. The wire to the filament carries a
current with a current density of 4.9×105 A/m2 Part A What is the
current in the filament? Express your answer to two significant
figures and include the appropriate units. Part B What is the
current density in the filament? Express your answer to two
significant figures and include the appropriate units.

For what electric field strength would the current in a
1.9-mm-diameter nichrome wire be the same as the current in a
0.50-mm-diameter aluminum wire in which the electric field strength
is 0.0080 V/m ?
Express your answer to two significant figures and include the
appropriate units.

Please show the steps
1) What is the magnitude of the electric field a distance 1.5 mm
from an electron?
E=?
2) Three point charges are placed on the x-axis as follows: 22
μC at x=0; 30 μC at x=0.60m;
and -10 μC at x=1.2m.
A) Find the net force on the 22 μC point charge. Assume
the direction of the x-axis as positive.
Express your answer to two significant figures and include the
appropriate units.
F1=?
B) Find the...

Consider an LR circuit when a 50.0-Hz 240-V
rms ac voltage is applied, where R = 2.30 kΩ , and
L = 410 mH .
What is the rms current the circuit?
Express your answer to three significant figures and include the
appropriate units.
What is the phase angle between voltage and current?
Express your answer using three significant figures.
How much power is dissipated?
Express your answer to three significant figures and include the
appropriate units.
What are the...

While visiting Planet Physics, you toss a rock straight up at
11m/s and catch it 2.5 s later. While you visit the surface, your
cruise ship orbits at an altitude equal to the planet's radius
every 250 min.
Part A. What is the mass of Planet Physics?
Express your answer to two significant figures and include the
appropriate units.
Part B. What is the radius of Planet Physics?
Express your answer to two significant figures and include the
appropriate units.

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