An anemometer measures which of the following?
Speed of wind
Anemometers are specifically designed to measure wind speed. They work by using rotating cups or vanes that spin faster in stronger winds. The rotation speed is then converted into a wind speed measurement. Options 1, 3, and 4 describe measurements taken by other instruments; light speed is measured with lasers, water current speed with flow meters, and satellite speed with tracking systems.
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Important Questions from Physics
What is the colour of the light emitted by the Sun?
Lightning occur in the sky when two clouds:
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
Which one of the following is a reason why astronomical distances are measured in light-years?
In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?
1. Area of the hole in the lid
2. Temperature of the flame
3. Weight of the lid
Select the correct answer using the code given below.
