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Electricity and Magnetism
Page 7
Questions (3,272)
A power line 10 meter high carries a current 200 amperes .Find the magnetic field of the wire at ground?
5 answers
asked by
shahed mumtaz khan
2,568 views
The drawing shows a uniform electric field that points in the negative y direction; the magnitude of the field is 4540 N/C.
5 answers
asked by
Anonymous
6,746 views
Part of a single rectangular loop of wire with dimensions .35 m by .75 m (.35 is the height and .75 is the length) is situated
4 answers
asked by
Nadine
3,634 views
You rub a balloon on your uncharged shirt and the balloon becomes charged. If the balloon gains a charge of - 8.0x10-6C of
4 answers
asked by
Emma
709 views
A particle has a charge of +1.5 µC and moves from point A to point B, a distance of 0.18 m. The particle experiences a constant
4 answers
asked by
ali
5,443 views
An electron with speed 2.35×107m/s is traveling parallel to a uniform electric field of magnitude 1.16×104N/C .
How far will
5 answers
asked by
James
7,886 views
A toaster uses a Nichrome heating wire. When the toaster is turned on at 20°C, the initial current is 1.50 A. A few seconds
7 answers
asked by
rick
2,249 views
Two 4.0cm × 4.0cm square aluminum electrodes, spaced 0.50mm apart are connected to a 300V battery.
What is the charge on the
10 answers
asked by
Anonymous
5,698 views
A 0.62-mm-diameter copper wire carries a tiny current of 2.0 μA . The molar mass of copper is 63.5 g/mole and its density is
4 answers
asked by
Jeff
4,837 views
a 20 ohm and 60 ohm resistors are connected in series to a DC generator. The voltage across the 20 resistor is 80 volts. The
7 answers
asked by
star
4,364 views
The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at
4 answers
asked by
Anne
13,391 views
A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 67 A and experiences a
4 answers
asked by
Anonymous
3,181 views
The same voltage is applied between the plates of two different capacitors. When used with capacitor A, this voltage causes the
4 answers
asked by
e
2,611 views
A capacitor of capacitance 3.0microfarad is subjected to a 2000v potential difference across its terminal.calculate the energy
5 answers
asked by
Ahmed
2,446 views
An electron is accelerated horizontally from rest in a television picture tube by a potential difference of 5400V . It then
4 answers
asked by
Jeremy
2,412 views
an electron is launched at a 30 degree angle with respect to the horizontal and a speed of 3.0*10^6 m/s from the positive plate
4 answers
asked by
Jordie
1,384 views
How long would it take in minutes to plate 1.00 gram of silver to a watch when 9.2 amps are passed through a silver (I) chloride
5 answers
asked by
Loon
916 views
The force between two identical charges separated by 1 cm is equal to 90 N. What is the magnitude of the two charges?
6 answers
asked by
Anonymous
10,067 views
A charge +q is at the origin. A charge -2q is at x = 6.30 m on the +x axis.
(a) For what finite value of x is the electric field
3 answers
asked by
Angel
3,712 views
A proton is at the origin and an electron is at the point x = 0.41 nm, y = 0.36 nm. Find the electric force on the proton.
I got
4 answers
asked by
Josh
3,238 views
A current of 30 mA flows in a conducting wire on a z-axis towards positive direction and three cylindrical coaxial current
4 answers
asked by
aru
525 views
A C1= 2.50uF capacitor is charged to 862 V and a C2= 6.80uF capacitor is charged to 660 V . These capacitors are then
4 answers
asked by
Steve
5,561 views
A cylindrical copper cable 1.50Km long is connected across a 220.0V potential difference.
(a) What should be its diameter so that
4 answers
asked by
Rohan Khan
2,298 views
In a television picture tube, electrons are accelerated by an electric field having a value of 1*10^5 N/C. Find the force on an
4 answers
asked by
kailey
1,582 views
Particle 1 carrying -4.0 μC of charge is fixed at the origin of an xy coordinate system, particle 2 carrying +8.0 μC of charge
4 answers
asked by
dineo
2,626 views
A 2.53-μC charged particle with a kinetic energy of 0.0929 J is fired into a uniform magnetic field of magnitude 0.147 T. If
4 answers
asked by
Caty
1,296 views
Near the surface of the Earth there is an electric field of about V=150 V/m which points downward. Two identical balls with mass
4 answers
asked by
Ambrie
3,574 views
How many electrons pass through a wire in 5 minutes, if the current through a wire is 400 mA
7 answers
asked by
satinder
7,148 views
A capacitor is constructed of two concentric conducting cylindrical shells. The radius of the inner cylindrical shell is 2.40
4 answers
asked by
Anonymous
1,321 views
Two charges are located along the x-axis. One has a charge of 6.3 μC, and the second has a charge of −3.4 μC.
If the
5 answers
asked by
Willow
3,052 views
How long will it take a charged 80-ìF capacitor to lose 20 percent of its initial energy when it is allowed to discharge
4 answers
asked by
Katie
5,278 views
Two 2.3-cm-diameter-disks spaced 1.8 mm apart form a parallel-plate capacitor. The electric field between the disks is 4.6×105
4 answers
asked by
Noah
857 views
A 1.5 uF capacitor is connected to a 9.0 V battery. Use PE=1/2C(change in V)^2 to find the energy stored in the capacitor.
5 answers
asked by
Michael
2,777 views
A circular ring of radius 10 cm has a continuous charge distribution of 4C/m .
How many total electrons are on the ring?
5 answers
asked by
nisha
1,612 views
If an electron travels 0.150 m from an electron gun to a TV screen in 19.0 ns, what voltage was used to accelerate it? (Note
3 answers
asked by
Justin
999 views
calculate the electric intensity at a point 15cm from a charge of 10 microcoulomb
5 answers
asked by
Titus
932 views
A step down transformer operates a 2400 volt lines and supplies a current of 60A.The turn ratio of the transformer is
5 answers
asked by
Ayo
1,362 views
17. Potential due to a point charge: What is the electric potential 17.0 cm from a 3.50 μC point charge?
5 answers
asked by
Lex
2,963 views
Answer True or False to each case. Coulomb's law states that the force between static charges Q1 and Q2
is proportional to Q1 Q2.
5 answers
asked by
Julie
2,503 views
A galvanometer of resistance 50 ohm which gives a full deflection for 1mA is to be adapted to measure currents up to 5A.
4 answers
asked by
chidinma
2,985 views
Use Coulomb's Law to calculate the energy of a copper ion and an oxide ion at their equilibrium ion-pair separation distance.
Cu^
4 answers
asked by
anonymous
3,906 views
A long, straight wire carrying a current of 317 A is placed in a uniform magnetic field that has a magnitude of 7.69 × 10-3 T.
4 answers
asked by
Anonymous
3,180 views
the elecric potential at a certain point is space is 12 V. What is the electric potential energy of a -3.0uc charge placed at
4 answers
asked by
josh
3,368 views
A +3.0 nC charge is at x=0 cm and a -1.0 nC charge is at x=4 cm. At what point or points on the x-axis is the electric potential
4 answers
asked by
Lauren
3,987 views
A 1.63 nF parallel-plate capacitor is charged to an initial potential difference ΔVi = 100 V and then isolated. The dielectric
4 answers
asked by
Physics
7,286 views
A 3.00 uF and a 5.00 uF capacitor are connected in series cross a 30.0V battery. A 7.00 uF capacitor is then connected in
4 answers
asked by
ALan
3,060 views
An object carries a charge of -6.4 µC, while another carries a charge of -2.0 µC. How many electrons must be transferred from
4 answers
asked by
Tatiana
2,065 views
A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.2 V when it is delivering 26.0 W of power to an
4 answers
asked by
Jasmine
3,377 views
A copper wire has a resistance of 0.425 at 20.0°C, and an iron wire has a resistance of 0.455 at the same temperature. At what
4 answers
asked by
Justin
5,943 views
An equipotential surface that surrounds a point charge q has a potential of 516 V and an area of 1.01 m2. Determine q
4 answers
asked by
adam h.
2,866 views
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