Physics Questions

Q:

which of the following has the longest wavelength

A) Infrared radiation B) γ-radiation
C) Ultraviolet radiation D) Visible radiation
 
Answer & Explanation Answer: A) Infrared radiation

Explanation:

Infrared radiation

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Q:

When a running car stops suddenly, the passengers tends to lean forward because of

A) Gravitational force B) Inertia of motion
C) Law of conservation of mass D) Both B & C
 
Answer & Explanation Answer: B) Inertia of motion

Explanation:

When a running car stops suddenly, the passengers tends to lean forward because of Inertia of motion.

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Q:

Which part of the flame is the hottest?

A) Blue Zone B) Luminous Zone
C) Dark Zone D) Non - Luminous Zone
 
Answer & Explanation Answer: A) Blue Zone

Explanation:

Blue Zone is the hottest part of the flame that is where the flame has the most Oxygen and you are getting complete combustion. It is about 1400 degrees Centigrades. The Reddish part (Non - Luminous Zone) is the coolest part, about 800 deg C.

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Q:

Visible light has a higher frequency than

A) Radio waves B) X rays
C) Ultra violet D) All the above
 
Answer & Explanation Answer: A) Radio waves

Explanation:

Radio waves have much longer wavelengths and lower frequencies than do visible light waves. In contrast, X-rays have much shorter wavelengths and higher frequencies. 

Ultraviolet Light (UV). part of the electromagnetic spectrum that consists of waves with frequencies higher than those of visible light and lower than those of x-rays.

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Q:

The flow of thermal energy is called

A) Heat B) Current
C) Voltage D) Potential
 
Answer & Explanation Answer: A) Heat

Explanation:

The flow of thermal energy due to differences in their temperatures is called Heat.

The_flow_of_thermal_energy_is_called1558527324.png image

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Q:

The temperature at which water boils depends mainly on

A) Air Pressure B) Specific heat
C) Density D) Relative humidity
 
Answer & Explanation Answer: A) Air Pressure

Explanation:

The temperature at which water boils depends mainly on air pressure.

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Q:

Which of the following is a renewable source of energy

A) Natural gas B) Coal
C) Wind D) Oil
 
Answer & Explanation Answer: C) Wind

Explanation:

The energy sources that are constantly being replenished, such as sunlight, wind, and water. This means that we can use them as much as we want, and we do not have to worry about them running out. Additionally, renewable energy sources are usually much more environmentally friendly than fossil fuels. Overall, they release very few chemicals, like carbon dioxide, that can harm the environment.


Most of this energy comes from fossil fuels, such as coal, oil, and natural gas. These are nonrenewable energy sources, which means that if we use them all up, we can never get more during our lifetime. Fossil fuels also contribute greatly to global climate change by releasing carbon dioxide into the air when they are burned.

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Q:

Light travels fastest in

A) Air B) Water
C) Glass D) Diamond
 
Answer & Explanation Answer: A) Air

Explanation:

Light travels fastest in Vacuum. The fastest thing in the whole universe is the speed of light in a vacuum like outer space. It is about 2.99 x 108 m/s. 

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