Magnetic fields are produced
Question 1
Magnetic fields are produced by moving electric charges.
True/False
Question 2
Pick the correct statement below.
sound consists of transverse waves
light waves require a medium to propagate
the speed of a wave depends on the medium it travels through
Question 3
Which of the following is not an advantage of using AC?
easy to convert to any voltage
the flow of current is lower
the flow of current is greater
lower power loss than DC
Question 4
Due to friction with the Earth’s atmosphere, a large static electric charge could build up on a plummeting asteroid fragment. We would not expect this fragment to generate a magnetic field.
True/false
Question 5
A moving electric charge will always experience a force in a magnetic field.
True/ False
Question 6
The direction of the force felt by a positive electric charge moving in magnetic field is _____ .
in the same direction as the magnetic field
in the direction opposite the magnetic field
perpendicular to the direction both the magnetic field and the direction of motion
none of the above
Question 7
Which statement below is correct?
voltage flows through a wire in an electric circuit
current flows through a wire in an electric circuit
both are correct
none are correct
Question 8
The Doppler effect is the apparent change in the speed of a wave due to the motion of the source.
True/False
Question 9
The amount of electric current that flows through a lamp that has a resistance of 15.0 Ohms and is connected to a 12.5 Volt battery is ____ Amps.
Only enter your numerical answer below – do not include units. Report your answer to 2 decimal places.
Answer:
Question 10
Determine the output voltage for a transformer that has 104 turns in its primary and 498 turns in its secondary. The input voltage is 13.0 volts.
Only enter your numerical answer below – do not include units. Report your answer to 2 decimal places.
Answer
Question 11
The amount of electric power used by a lamp that has a resistance of 17.0 Ohms and is connected to a 36.0 Volt battery is ____ Watts.
Only enter your numerical answer below – do not include units. Report your answer to 2 decimal places.
Answer:
Question 12
A local FM radio station broadcasts at a frequency of 105.0 MHz. What is the wavelength, in meters, of the electromagnetic waves produced?
Only enter your numerical answer below – do not include units. Report your answer to 2 decimal places.
Answer:
Attempt Score:
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