6. In which of the following instruments, the objective has a large focal length and a very large eyepiece?
A. simple microscope
B. compound microscope
C. telescope
D. camera
7. First image produced by a compound microscope is
A. real and inverted
C. virtual and erect
B. real and erect
D. virtual and inverted
_8. The image formed by camera in film is
A. virtual, upright, smaller than the object
B. virtual, inverted, smaller than the object
C. real, inverted, smaller than the object
D. real, upright, smaller than the object
9. The image formed by a magnifying glass has properties of
A. real, inverted, enlarged
B. virtual, inversed, enlarged
C. real, upright, enlarged
D. virtual, upright, enlarged
10. Which optical instrument is inserted in the body in order to observe internal passages such as a person’s
esophagus or intestine?
A. camera
B. endoscope
C. magnifying lens
D. periscope
11. If I were to try to connect the north pole of one magnet to the south pole of another magnet, the two
poles would:
A. Attract
B. repel
C. neither
D. flip
12. In order for an electromagnet to be formed, an current must pass through a coil of
wrapped around an core.
A. wire, iron, electric
C. electric, wire, iron
B. iron, electric, wire
D. electric, tape, wire
13. While electric current is flowing through a wire, what surrounds the wire?
A. magnetic field
B. glowing light
C. neutrons
D. protons
14. What is the flow of electrical charges called?
A. Voltage
B. Resistance
C. Current/electricity
D. Circuit
15. What does a motor do?
A. Moves up and down
C. Rotates without electricity
B. It does not move without magnet
D. Uses electricity to rotate
Answer:
6.C.Telescope
7.D.Virtual and inverted
8.A.virtual.upright.smaller than the object
9A.real.inverted.enlarged
10.B.endoscope
11.D.flip
12.D.electric.tape.wire
13.D.proton
14D.cicuit
15.B.it does not move without magnet
Explanation:
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