Answer:
Explanation:
Generators produce a potential difference (voltage) by spinning a coil of wire in a magnetic field by induction.
The produced voltage is proportional to the relative speed of the coil wire with respect to the magnetic field.
Hence, for a given generator, the higher the speed the higher the potential difference.
Therefore, it is concluded immediately that when Kristina spins the generator slowly, less potential difference (voltage) is generated.
Also, you must know that the brightness of the bulbs varies with the current: the higher the current, the brigther the bulbs.
On the other hand, the basic realtion between voltage (V), resistance (R), and current I) is given by Ohm's law: V = R × I. This is, voltage and current are proportional.
Since the generator is producting less voltage, for the same bulbs (which are resistors) , the current will be lower too. And, as stated, lower current means lower brightness, which explains why when Kristina spins the generator slowly, the bulbs are very dim.
Answer:
the batteries don’t make the charges move as much as the generator
Explanation:
the generator is a low voltage power source and voltage is the pressure that pushes the charges through the circuit. If we only looked at the voltages for the generator and batteries alone, the batteries have a higher voltage and the bulbs would be very bright and when you use the generator, the bulb would be dimmed.
this is not the case so we can eliminate that answer.
the generator’s handle is spinning very fast and the faster the generator’s handle spins, the brighter the bulb, the faster the current. Since the current is faster than the two batteries, the bulbs will be brighter if the generator is used than just using batteries.
Also took the quiz and got it correct.
