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Q:

The working principle of a washing machine is

A) reverse osmosis B) diffusion
C) centrifugation D) dialysis

Answer:   C) centrifugation



Explanation:

The working principle of a washing machine is centrifugation.

The_working_principle_of_a_washing_machine_is1542349278.jpg image

Subject: Physics
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Q:

Analog synthesis refers to a technology based on

A) placing brief digital recordings of live sounds under the control of a synthesizer keyboard. B) interfacing synthesizer equipment.
C) representing data in terms of measurable physical quantities. D) representing physical quantities as numbers.
 
Answer & Explanation Answer: C) representing data in terms of measurable physical quantities.

Explanation:

Analog synthesis uses a mixture of complex sounds that are shaped by filtering. It is based on representing data in terms of measurable physical quantities, in this case sound waves.

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Q:

A gradual increase in loudness is known as

A) Crescendo B) Timbre
C) Fortissimo D) None of the above
 
Answer & Explanation Answer: A) Crescendo

Explanation:
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Q:

Magnetism in materials is due to

A) Displacement of electrons B) Circular motion of electrons
C) Charges of neutrons D) All of the above
 
Answer & Explanation Answer: B) Circular motion of electrons

Explanation:

Magnetism in materials is due to circular motion of electrons.

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Q:

Thermohaline circulation is mainly due to

A) cold, dense ocean water sinking and warmer water replacing it B) winds causing circulation of ocean water
C) warmer, less dense water sinking in the ocean and cold water replacing it D) warm water being added to the ocean due to industial waste
 
Answer & Explanation Answer: A) cold, dense ocean water sinking and warmer water replacing it

Explanation:
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Q:

When an unbalanced force acts on an object

A) causes change in motion of the object B) the speed & direction of the object will change
C) causes the object to move D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

Unbalanced forces are the forces which causes change in motion of the object. It sets the object in motion and may cause the object to move. If the object is already in motion, it changes the speed and direction of the object.

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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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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 vitamin is also called as H vitamin?

A) Vitamin B7 B) Vitamin B12
C) Vitamin B3 D) Vitamin B5
 
Answer & Explanation Answer: A) Vitamin B7

Explanation:

Biotin is a water-soluble B vitamin, also called vitamin B7 and formerly known as vitamin H or coenzyme R.

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