A 580-mm long tungsten wire, with a 0.046-mm-diameter circular
cross section, is wrapped around in the shape of a coil and used as
a filament in an incandescent light bulb. When the light bulb is
connected to a battery, a current of 0.526 A is measured through
the filament. (Note: tungsten has a resistivity of 4.9 × 10-8 ? •
m.) How many electrons pass through this filament in 5 seconds?
How many electrons pass through this filament in 5...
Part A
How many conduction electrons are there in a 4.50 mm diameter gold
wire that is 30.0 cm long?
Part B
How far must the sea of electrons in the wire move to deliver -24.0
nC of charge to an electrode?
Express your answer with the appropriate units.
A 2.8 mm -diameter copper wire carries a 31 Acurrent (uniform
across its cross section).
A) Determine the magnetic field at the surface of the wire.
B) Determine the magnetic field inside the wire, 0.50 mm below
the surface.
C) Determine the magnetic field outside the wire 2.5 mm from the
surface.
Water flows through a cast iron pipe with a diameter of 30 mm.
The pipe is inclined at an angle of 3 degrees from horizontal and
is 40 m long. The water flows due to gravity only. What is the
maximum volume flow rate of the water?
You may ignore any minor loses.
Consider an electron beam of uniform circular cross-section with
a diameter of 1 mm. The electrons are accelerated from the cathode
to the anode, which are separated by 1 m. The electrons are
generated at the cathode and therefore have negligible velocity at
this position. The electrons accelerate at a rate of 108 ?/?2
between the cathode and anode. The current density at the anode is
104 ?/?2 .
Find the current density as a function of position between the...
The figure shows wire 1 in cross section; the wire is long and
straight, carries a current of 4.20 mA out of the page, and is at
distance d1 = 2.61 cm from a surface. Wire 2, which is parallel to
wire 1 and also long, is at horizontal distance d2 = 5.22 cm from
wire 1 and carries a current of 7.06 mA into the page. What is the
x component of the magnetic force per unit length on...
Consider the cylindrical wire of radius R= 5mm having current
density through
a cross section varies with radial distance ‘r’ as J= (3x 109 A/m4
) r2 , and ‘r’ is
in meters. What is the current through the outer portion of the
wire between
radial distances r=0.75R and r=R.
An axial flow fan has a hub diameter of 1.50 m and a tip
diameter of 2.0 m. It rotates at 18 rad/s and when handling
5.0?^(3)s^(-1) of air, develops a
theoretical head equivalent to 17mm of water. Determine the blade
outlet and inlet angles at the hub and the tip. Assume that the
velocity of flow is independent of radius and that the energy
transfer per unit length of blade is constant. Assume density of
air is1.2 kg/m^3
A current carrying gold wire has diameter of 0.84 mm.
the electric field in the wire is 0.49 V/m. What is
a The current carried by the wire?
b The potential difference between two points in the
wire 6.4 m apart?
c The resistance of a 6.4 m length of this wire.