Please help me answer these question about Electromagnetism 1. When is a magnetic field not acting...
Please help me answer these question about Electromagnetism
1. When is a magnetic field not acting on a moving charge?
2. When does a magnetic field produce electric current in a closed circuit?
3. Explain why a transformer works only in alternating current, AC not direct current DC.
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Please help me answer these question about Electromagnetism
1. When is a magnetic field not acting...
plz....help me.. 9. Answer the following questions. (20) a. There is a charge moving back and...
plz....help me..
9. Answer the following questions. (20) a. There is a charge moving back and forth between two points. Sketch the electric field lines generated by the charge. (10) b. People believe that the high voltage AC (alternating current) power transmission lines generate low frequency electromagnetic waves harmful to human health. In some countries, high voltage DC (direct current) power transmission is partly being implemented. Could it be a solution to the health hazard of EM waves? Why? (10)
help me with this true false concepts PHYS2326-TEST II Name ID 2. The magnetic force on...
help me with this true false concepts
PHYS2326-TEST II Name ID 2. The magnetic force on a moving charge q is parallel to both its velocity and its magnetic field. 3. A magnetic field will always exerts a force on any charge (or current) present in the field. 4. Two charges of equal magnitude but opposite signs moving in the same direction in the same field will experience magnetic forces in same directions. 5. RC circuits differ from DC circuits...
Am I correct in thinking that AC (alternating current) is induced from a magnetic field and...
Am I correct in thinking that AC (alternating current) is induced from a magnetic field and DC (direct current) is produced in an electric field? If no, please explain the origins and difference between the two. Thanks
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 11)...
TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 11) A changing magnetic field can produce an electric current. 12) An emf is induced in a wire by moving the wire near a magnet. 13) A constant magnetic field can be used to produce an electric current. 14) An electric generator is a device that converts electrical energy into mechanical energy. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers...
1 of 15 When a field is parallel to a plane of area, the magnetic flux...
1 of 15 When a field is parallel to a plane of area, the magnetic flux through the coil is A zero. B infinite. C 2. D 5. Question 2 of 15 A moving charge experiences magnetic forces because of a A magnetic flux. B magnetic field. C magnetic current. D both a and b. Question 3 of 15 Total number of magnetic field lines passing through an area is called A magnetic flux density. B magnetic flux. C emf....
Help me solve this question asap a) Write the expression for the force acting on an...
Help me solve this question asap
a) Write the expression for the force acting on an electron carrying a charge e moving with velocity v when it enters perpendicularly into (i) an electric field of intensity E b) Sketch two separate diagrams of the direction of field, velocity and path of ) With reference to your diagrams, state two differences between the electric (ii) a magnetic field of intensity B the electron and the force acting on it for the...
Please help me understand this physics assignment.? 28. When the magnetic field infinity is parallel to...
Please help me understand this physics assignment.?
28. When the magnetic field infinity is parallel to the velocity the resultant magnetic force will be equal to a) True b) False 29. The magn etic field lines of a magnet are always closed from north pole to south pole a) True b) False If the charged particle is not moving there will be no magnetic force a) True 30. b) False 31. If the magnetic field EB is perpendicular to the...
Help pls answer all . The fact that an electric current generates a magnetic field has...
Help pls answer all .
The fact that an electric current generates a magnetic field has allowed people to 20. cons ruct which of the following devices? (Choose as many as apply.) (A) ammeters (B) voltmeters (C) motors (D) none of these When a magnet is plunged into a coil of wire, the magnitude of the current induced is affected by which of the following? (Choose as many as apply.) (A) the speed with which the magnet is plunged into...
corresponding choices I. Select each true statement concerning electric circuits a. Conventional current is the flow...
corresponding choices I. Select each true statement concerning electric circuits a. Conventional current is the flow of electrons. b. Voltage is constant for series circuits. c. Current is constant for parallel circuits. d. A circuit can be both series and parallel. e. A circuit can be neither series nor parallel Select each true statement concerning electric potential a. When moving a pos itive charge toward a negative charge, electric potential increases. b. Electric equipotential lines and Electric field lines are...
When resistors are connected in series, the equivalence resistances will be closest to the value of:...
When resistors are connected in series, the equivalence resistances will be closest to the value of: Smallest resistor value Middle resistor value Largest resistor value An electro-magnetic wave of a moving charge will have an electric field and a magnetic field. In an electric circuit, the capacitor will store: magnetic field electric field A resistor is put in a circuit to control the amount of charge that flows through it. In the process of controlling the charge, what will happen...
plz....help me..
9. Answer the following questions. (20) a. There is a charge moving back and forth between two points. Sketch the electric field lines generated by the charge. (10) b. People believe that the high voltage AC (alternating current) power transmission lines generate low frequency electromagnetic waves harmful to human health. In some countries, high voltage DC (direct current) power transmission is partly being implemented. Could it be a solution to the health hazard of EM waves? Why? (10)
help me with this true false concepts
PHYS2326-TEST II Name ID 2. The magnetic force on a moving charge q is parallel to both its velocity and its magnetic field. 3. A magnetic field will always exerts a force on any charge (or current) present in the field. 4. Two charges of equal magnitude but opposite signs moving in the same direction in the same field will experience magnetic forces in same directions. 5. RC circuits differ from DC circuits...
Help me solve this question asap
a) Write the expression for the force acting on an electron carrying a charge e moving with velocity v when it enters perpendicularly into (i) an electric field of intensity E b) Sketch two separate diagrams of the direction of field, velocity and path of ) With reference to your diagrams, state two differences between the electric (ii) a magnetic field of intensity B the electron and the force acting on it for the...
Please help me understand this physics assignment.?
28. When the magnetic field infinity is parallel to the velocity the resultant magnetic force will be equal to a) True b) False 29. The magn etic field lines of a magnet are always closed from north pole to south pole a) True b) False If the charged particle is not moving there will be no magnetic force a) True 30. b) False 31. If the magnetic field EB is perpendicular to the...
Help pls answer all .
The fact that an electric current generates a magnetic field has allowed people to 20. cons ruct which of the following devices? (Choose as many as apply.) (A) ammeters (B) voltmeters (C) motors (D) none of these When a magnet is plunged into a coil of wire, the magnitude of the current induced is affected by which of the following? (Choose as many as apply.) (A) the speed with which the magnet is plunged into...
corresponding choices I. Select each true statement concerning electric circuits a. Conventional current is the flow of electrons. b. Voltage is constant for series circuits. c. Current is constant for parallel circuits. d. A circuit can be both series and parallel. e. A circuit can be neither series nor parallel Select each true statement concerning electric potential a. When moving a pos itive charge toward a negative charge, electric potential increases. b. Electric equipotential lines and Electric field lines are...
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