1. 1) Three light-bulbs are connected in parallel across a battery. One has a th
ID: 3893310 • Letter: 1
Question
1. 1) Three light-bulbs are connected in parallel across a battery. One has a thick filament, one a thin filament, and one a medium filament. Which one has the lowest voltage across the lamp.
a. Medium
b. Thin
c. Thick
d. There is no voltage across the filaments
e. Voltage is the same across all three filaments
2) A pith ball is suspended by a non-conducting fiber. When a positively charged rod is brought near the ball, but without touching it, the ball
a. Becomes positively charged
b. Becomes negatively charged
c. Becomes depolarized
3) A magnetic field changes with time and induces a voltage in a coil.
a. Electromagnetic induction
b. Transformer
c. Generator
d. Faraday
Explanation / Answer
e) voltage is same because they are connected in parallel
a) becomes positively charged because it is a property of pith ball
a) electromagnetic induction
4) it depends upon if resistors are added in series or parallel. in series resistance increases and in parallel it decreases. also current decreases in series and increases in parallel
5) it depends upon if resistors are added in series or parallel. in series resistance increases and in parallel it decreases. also current decreases in series and increases in parallel. it can also remain same if some are added in series and some in parallel
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