Physics Questions

Q:

Which color has the highest energy?

A) Violet B) Red
C) Blue D) White
 
Answer & Explanation Answer: A) Violet

Explanation:

Violet colour has the highest energy. The higher the frequency, the faster the oscillations and thus the higher the energy. Therefore, the highest-frequency ultra-violet light or the lowest wavelength is violet.

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5 2093
Q:

The primary agent of contact metamorphism is

A) Temperature B) Pressure
C) Weathering D) Flowing water
 
Answer & Explanation Answer: A) Temperature

Explanation:

The primary agent of contact metamorphism is heat or temperature.

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Q:

Rear view mirror of car is convex or concave?

A) Convex B) Concave
C) Both A & B D) Can't be determined
 
Answer & Explanation Answer: A) Convex

Explanation:

The side view mirror, in all the vehicles we use only convex mirror. This mirror makes the objects and small to show them in the mirror. That's why in all such mirrors, "Ojects in the mirror are closer than they appear."

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Q:

In beta decay what is emitted

A) electron B) proton
C) neutron D) All of the above
 
Answer & Explanation Answer: A) electron

Explanation:
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2 2083
Q:

Two categories of laser printers are

Answer

There are two types of printers we use. They are 


* Laser Printers and


* Inkjet Printers.


 


And again Laser printers are of two categories. They are ::


 


1. Personal laser printers  and


2. Office laser printers.

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3 2075
Q:

What is the heat generated (in J) in a heating element of resistance 900 Ω when a current of 0.3 A passes through it for 10 seconds?

A) 2700 B) 810
C) 405 D) 1350
 
Answer & Explanation Answer: B) 810

Explanation:
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Q:

Middle latitude cyclones are fueled by? 

A) air high in the atmosphere B) polar continental air masses
C) energy from falling precipitation D) All of the above
 
Answer & Explanation Answer: A) air high in the atmosphere

Explanation:

Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth.

 

Middle latitude cyclones are fueled by air high in the atmosphere.

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Q:

The capacity of a water heater is measured in

A) Gallons B) Liters
C) Meters D) Both A & B
 
Answer & Explanation Answer: D) Both A & B

Explanation:

The capacity of a water heater is measured in Gallons or Liters. In the USA, it is measured in Gallons and in India, we measure it in Liters.

Hence, if the capacity of the water heater is 15 gallons or 15 liters, then it says that it can hold 15 gallons or 15 liters of water.

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3 2056