A magnetic field is created by an electric charge if the charge is
a. positive
b. negative
c. moving
d. stationary
e. any of the above
[Ques. 2] A magnetic field exerts a force on an electric charge if the charge is
a. positive
b. negative
c. moving
d. stationary
e. any of the above
[Ques. 3] The direction of a magnetic field at a point can be determined by
a. a generator
b. a compass
c. a transformer
d. electromagnetic induction
e. none of the above
[Ques. 4] The deviation from the way a compass needle points from the true north direction is the
a. greenhouse effect
b. magnetic inclination
c. magnetic declination
d. magnetic resonance effect
e. none of the above
[Ques. 5] N rays do not exist.
Indicate whether the statement is true or false
[Ques. 6] AM radio stations have greater range than FM stations because they have more powerful transmitters.
Indicate whether the statement is true or false
[Ques. 7] A coil of wire is connected to a galvanometer. When the coil is rotated in a magnetic field, the galvanometer records a current because the free electrons in the moving wire experience a force from the magnetic field that pushes them through the wire.
Indicate whether the statement is true or false
[Ques. 8] A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current because of electromagnetic induction.
Indicate whether the statement is true or false
[Ques. 9] A body in a room at 300 K is heated to 3,000 K. The wavelength of the most intense EM radiation emitted by the body at 3,000 K is 10 times the wavelength of the most intense EM radiation at 300 K.
Indicate whether the statement is true or false
[Ques. 10] A body in a room at 300 K is heated to 3,000 K. The amount of energy radiated each second by the body increases 10,000 times.
Indicate whether the statement is true or false
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