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Electricity and Magnetism
[img]https://upload.cc/i1/2020/05/09/1kWre3.jpg[/img]
question in picture,R=4, you can sub R=4
question in picture,R=4, you can sub R=4
Electricity and Magnetism
[img]https://upload.cc/i1/2020/05/09/7UPKyl.jpg[/img]
R=4 ,you can sub R=4
R=4 ,you can sub R=4
Electricity and Magnetism
An observer standing in a southern hemisphere facing towards north is observing cathod Ray's moving away from him then what will be deflecting direction of cathod Ray's?
Electricity and Magnetism
Two major nuclear disasters occurred in recent history: Chernobyl in 1986 and Fukushima in 2011. In Chernobyl the accident occurred while they were conducting a safety test and in Fukushima the disaster occurred due to an earthquake which was quickly followed by tsunami. Regardless of why the disaster occurred, in each case safety measures in place were unable to contain the radioactivity and major leaks occurred.
Choose ONE of these disasters and answer the following questions.
1. Describe the safety measures (equipment and/or protocols) that failed during this disaster.
2.Is the site still considered to be dangerously radioactive?
3.What was the impact on people, animals and the environment close to the area of the accident?
Choose ONE of these disasters and answer the following questions.
1. Describe the safety measures (equipment and/or protocols) that failed during this disaster.
2.Is the site still considered to be dangerously radioactive?
3.What was the impact on people, animals and the environment close to the area of the accident?
Electricity and Magnetism
July 16, 2186 a solar eclipse lasting seven minutes and 29 seconds will be observed over the mid Atlantic ocean during the eclipse in observer may need a flashlight to see if the flashlight draws a current of .22 A how much charge will pass to the lightbulb during the eclipse
Electricity and Magnetism
Verify my answer?
1.In the U.S.A., most homes receive AC current which is commonly called "120 volts." A graph of the voltage in the wires is over time would show
A. a straight line at 120 V
B. a sin or cos wave with a peak of 120 V and a trough of 0V
C. a sin or cos wave with a peak of more than 120 V and a trough of 0V
D. a sin or cos wave with a peak of more than 120 V and a trough more negative than 120 V
E. a sin or cos wave with a peak of more than 120 V and a trough of -129
=>D
2. In the U.S.A., many homes can have some circuits for appliances that get "240 volts" instead of the regular 120 volts.The increased voltage in these circuits results from
A. The circuit is using all of the coils from the transformer instead of half of the coils
B. The circuit gets current from a different transformer than those who get 120V
C. The circuit has thicker wires for less resistance
D. The appliance(s) plugs into the wall twice
=>A
1.In the U.S.A., most homes receive AC current which is commonly called "120 volts." A graph of the voltage in the wires is over time would show
A. a straight line at 120 V
B. a sin or cos wave with a peak of 120 V and a trough of 0V
C. a sin or cos wave with a peak of more than 120 V and a trough of 0V
D. a sin or cos wave with a peak of more than 120 V and a trough more negative than 120 V
E. a sin or cos wave with a peak of more than 120 V and a trough of -129
=>D
2. In the U.S.A., many homes can have some circuits for appliances that get "240 volts" instead of the regular 120 volts.The increased voltage in these circuits results from
A. The circuit is using all of the coils from the transformer instead of half of the coils
B. The circuit gets current from a different transformer than those who get 120V
C. The circuit has thicker wires for less resistance
D. The appliance(s) plugs into the wall twice
=>A
Electricity and Magnetism
Can you verify my physic answer ?
1. A wire has current directed to your left. What direction is the magnetic field from the wire just above the wire? ==> away from you ( into the page )
2. A conductor carrying a current is arranged so that current flows away from you. If the wire is sitting in a magnetic field that points downward, what direction will the wire get pushed? ==> to the left
3. According to Faraday’s Law, what has to happen for a current to be induced in a coil of wire?
A. The coil must have a battery attached to it
B. There must must be a magnetic field through the coil
C. There must must be a changing magnetic field through the coil
D. The coil must be moving
==> C
4. The permanent bar magnet is moved to the left, toward a loop of wire. The north pole of the magnet is closer to the loop, as shown. What direction will the (induced) magnetic field be in the center of the loop of wire?
==> Right
1. A wire has current directed to your left. What direction is the magnetic field from the wire just above the wire? ==> away from you ( into the page )
2. A conductor carrying a current is arranged so that current flows away from you. If the wire is sitting in a magnetic field that points downward, what direction will the wire get pushed? ==> to the left
3. According to Faraday’s Law, what has to happen for a current to be induced in a coil of wire?
A. The coil must have a battery attached to it
B. There must must be a magnetic field through the coil
C. There must must be a changing magnetic field through the coil
D. The coil must be moving
==> C
4. The permanent bar magnet is moved to the left, toward a loop of wire. The north pole of the magnet is closer to the loop, as shown. What direction will the (induced) magnetic field be in the center of the loop of wire?
==> Right
Electricity and Magnetism
A point charge Q1 = + 3 C is placed at the origin, and a point charge Q2 = -7 C is placed at x = 0.4 m on the x-axis of a Cartesian coordinate system.
(a) Determine the electric field, , at all points along the x-axis.
(b) Plot E(x) vs. x for x 0.
(a) Determine the electric field, , at all points along the x-axis.
(b) Plot E(x) vs. x for x 0.
Electricity and Magnetism
We have an infinite, non conducting, sheet of negligible thicknress carrying a negative uniform surface charge density and, next to it, an infinite parallel slab of thickness D with positive uniform volume charge density (see sketch). All charges are fixed. Calculate the direction and the magnitude of the electric field.
(a) Above the negatively charged sheet.
(b) In the slab
(c) Below the slab
(d) Make a plot of E as a function of distance, z, from the sheet.
(a) Above the negatively charged sheet.
(b) In the slab
(c) Below the slab
(d) Make a plot of E as a function of distance, z, from the sheet.
Electricity and Magnetism
A photon of energy E is scattered by a particle of rest energy Eo. Find the maximum kinetic energy of the recoiling particle in terms of E and Eo
