1. What data could be used to make a conclusion of you stand in front of two adjacent large mirrors at 90° angle?
a. There is only one image formed.
b. There are two images formed.
c. There are three images formed.
d. There are three images formed.
2. What facts would you select in a convex mirror?
I. It will never form a real image.
II. An inverted image will be formed if the object distance is greater than the focal length
III. An object can be magnified if it is placed at p = 3f
A. I only B. II only C. I and II D. I, II, III 3. In which case or cases is electric field present?
I. A spark jumping between two nearby rods.
II. A charge that is momentarily at rest.
III. A rotating bar magnet.
A. I only C. II and III
B. I and I only D. I,II and III
4. Which one is true about an electromagnet?
A. The electric field surrounding a battery-powered electromagnet alternates constantly.
B. The current in the electromagnet coil temporarily magnetizes the iron core.
C. The electric field strength is inversely proportional to the current.
D. The magnetic field lines produced all straight.
5. Why do you think a compass always point north?
A. The needle is a magnet and it aligns itself with the Earth's magnetic field
B. Earth's South Pole does not have a magnetic pull.
C. Earth is a magnet and it attracts all metallic objects towards the north.
D. All magnets have a north and south pole.
6.What inference can you make when two magnets attract?
A. It changes color.
B. It gets colder.
C. It pulls together.
D. It pushes apart.
7. As part of a traffic light system, large loops of wire are buried beneath road intersections. What inference can you make about the operation of this traffic light system?
A. Vehicles driven over the buried coils activate a traffic light sensor.
B. The conducting loops activate a color-dependent field
C. The alternating current sent through the buried coils do not produce an electromagnetic field in each coil.
D. A minimum number of vehicles over the coils can trigger the traffic light to change red.
8. Which is the best answer that describes transformer?
A. step-down voltage transformer increases the current.
B. Transformer does not use mutual induction.
C. Transformer is an application of Faraday's and Lenz's Laws. D. A transformer can function with either an alternating current (AC) or a steady direct current (DC).
9. What idea justifies that a magnetic field is present in a device?
A. A charged balloon.
B. A cooling soldering iron.
C. A very hot horse-shoe magnet.
D. A microphone undergoing a sound check.
10. Which one uses mechanical energy to produce electrical energy?
A. Electric motor
B. Magnet
C. Generator
D. Solar Cell
11. What could be done to reduce the amount of resistance on a given conductors?
A. Increase the length of the wire.
B. Increase the temperature.
C. Increase the cross-sectional area of the wire.
D. Use a higher density of a wire.

pakisagot please.​
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