Astrand of 10 lights is plugged into an outlet. how can you determine if the lights are connected in series or parallel? a) unscrew one light. if the other lights stay on, it's a series circuit. b) unplug the strand. if the first light stays on, it's a series circuit. c) unscrew one light. if the other lights turn off, it's a series circuit. d) cut the strand in half. if the plugged in half stays on, it's a series circuit

C) Unscrew one light. If the other lights turn off, it's a series circuit.

Explanation:

In a series circuit, all the components in the same path. The current in the entire circuit is same. The voltage drop across each component is different. If one component does not work, the entire circuit breaks and other components also stop working. On the other hand, in a parallel circuit, voltage drop across all the components is equal. Trouble in one component does not effect other components.

Hence, to check whether the lights are connected in series or in parallel, one light should be unplugged and if the other lights still work, it means they are connected in parallel otherwise in series. Thus, correct option is C)Unscrew one light. If the other lights turn off, it's a series circuit.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).