15. Imagine a simple circuit with one 1.5 volts battery and a bulb. When the 1,5 volts battery is
replaced with a 3 volts battery. What will happen.
A. The bulb gets brighter.
B. The bulb gets dimmer.
C. The bulb stays at the same level of brightness.
D. Nothing has changed.
16. Imagine a circuit with a 1.5 volts battery and a bulb and a similar circuit with a 3 volts
battery and two bulbs. Which has the brighter glow?
A The circuit with 1.5 volts battery and one bulb.
B. The circuit with 3 volts battery and two bulbs.
C. The bulbs in both circuits are of similar brightness levels.
D. The bulbs in both circuits will not lit.
17. Why might a bulb have busted when a 3 pieces 3 volts battery are both connected across
in a simple series circuit?
A There is insufficient amount electricity flowing in the circuit.
B. Too much electricity flows through the bulb's filament and the bulb blows.
C. The batteries are not connected properly.
D. The batteries are used up or uncharged.
18. What is the effect of changing the wire in a circuit from a straight short wire to a longer
coiled thick wire?
A The bulbs become dimmer.
B. The bulbs become brighter.
C. The bulbs stay at the same level of brightness.
D. Nothing has changed.
19. Which material can be a conductor for an electromagnet?
A rubber
B. copper
C. plastic
D. cotton
20. Which object is NOT used in making electromagnet?
A. electricity
B. wire C. magnet
D. core​