Solar lights are a simple solution for night-time outdoor lighting. You simply stick them in the ground and they store up their own power during the day and release it at night. See how much you know about solar yard lights by taking this quiz.
What is the main benefit of solar yard lights?
They are cheap.
They are very bright.
No wires are necessary.
When installing solar yard lights, how should they be positioned?
Place many lights close together.
Place the lights under direct sunlight.
Place the lights in a sheltered area.
Which of the following functions in a similar way to solar yard lights?
What type of battery do solar yard lights use?
What sort of light source does a solar yard light use?
How does a solar yard light know when it gets dark?
It is set on a timer.
It has a light sensor.
It measures the drop in temperature when the sun sets.
Up to how many volts can a single solar cell produce?
How many solar cells would you find in a typical solar yard light?
What is the function of a diode in a solar cell?
It allows for slow release of stored energy.
It prevents backflow of current.
It increases the amount of current.
What factors affect the amount of charge the NiCad battery will reach?
the length of the day
both of the above
How long can the NiCad battery operate the LED for?
How much light will an LED emit compared to a candle?
half the amount of light of a candle
the same amount of light as a candle
double the amount of light of a candle
What is a problem with solar cells?
They are very difficult to wire.
They are expensive.
They need regular replacing.
How are some solar yard lights designed to produce a stronger light?
A halogen bulb is added.
They have a back-up power supply.
They have extra solar cells.
In solar yard lights with a halogen bulb, what causes the halogen light to turn on?