Quiz
Unit 3 final review
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Perguntas do quiz (30)
1The flow of charge that transports energy from one place to another.
- Aelectric current
- Belectric force
2The force between magnets attract unlike magnetic poles. This force deflects a moving charge in a magnaetic field.
- AMagnetic Force
- BElectrical potential
3Number of vibrations or waves per unit time is called frequency
- AVerdadeiro
- BFalso
4Range of electromagnetic waves extend in frequency from radio waves to gamma rays. This is called the electromagnetic spectrum.
- AVerdadeiro
- BFalso
5A magnet whose field is produced by an electric current. It is usually in the form of a wire coil with a piece of iron inside the coil.
- Aelectromagnet
- Belectric potential
6The seprartion of light into colors arranged by frequency is called
- Arefraction
- Bdispersion
7The force between two charged particles at a distance. Like charges the force repels; unlike charges the force attracts.
- ACoulombs Law
- BOhms Law
8Electric potential energy per unit charge, measured in volts.
- Aelectric potential
- Belectric field
9Waves in medium vibrate paralell to the direction in which waves travel, which is called a longitudal wave.
- AVerdadeiro
- BFalso
10An electric current that repeatedly reverses direction (vibrates); in the US at 60Hz
- Aalternating current (AC)
- Bdirect current (DC)
11A 40 resistor is connected to a 120 volt power supply. The current resistor is
- A3 A
- B1.5A
12What is the power rating of a lamp connected to a 10-V source when it carries 4 A?
- A2.5W
- B40W
13Ohms law is V=IR
- AVerdadeiro
- BFalso
14Magnet A has twice the magnetic field strength of Magnet B. At a certain distance it pulls on magnet B with a force of 100N. How much force does magnet B pull on Magnet A?
- A25N
- B100N
15What is the power used by a resistor with a 120-V voltage drop across it and a 3 A current running through it?
- A360 W
- B720 W
16If the distance between two electric charges q1 and q2 is doubled, the force between the two charges is
- Aone quarter
- Bone half
17two resistors are connected paralell, if one resistor is 10 and the other is 10 what is the total resistance?
- A2.5
- B5
18a 12V battery is connected in a series circuit with two light bulbs. The voltage drop across one lightbulb is 8V, what is the voltage of the other?
- A4
- B6
19Compared with the light wave that shines on glass, the emerging light is identical through not the same light wave.
- AVerdadeiro
- BFalso
20A wave having a frequency of 10Hz vibrates at 100 cycles per second
- AVerdadeiro
- BFalso
21What moves from place to place in wave motion is
- Amomentum
- Benergy
22Which of these has a lower frequency than visible light?
- Ax-ray
- Bmicrowave
23When a fire engine moves away from you the
- Afrequency of sound decreases
- Bspeed of its sound increases
24Two resistors are connected in a series. If on is 20 and the other is 20 what is total resistence?
- A40
- B20
25The source of all magnetism is moving electric charge
- AVerdadeiro
- BFalso
26A voltage drop across a resistor is measured to be 10V with a 2A current running through it. What is the resistance of the resistor?
- A5
- B10
27Magnetic field lines about a current carrying wire
- Acircle the wire in closedloops
- Bextend radially from the wire
28If the frequency of a certain wave is 1 Hz, its period is 1s
- AVerdadeiro
- BFalso
29An explosion occurs 34km awat. For sound that travels at 340 m/s you will hear the explosion in
- A10s
- B100s
30Visible light that shines on a pane of transparent glass produces a chain of absoprtions and reemissions through the glass.
- AVerdadeiro
- BFalso
Informações
- Descrição
- Quiz sobre Unit 3 final review, criado por Kim Mathis em 12-12-2017.
- Autor
- Kim Mathis
- Idioma
- English
- Visualizações
- 1
- Avaliação
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