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Q:

Which of the following is/are state function / functions?

1. q + w

2. q

3. w

4. H -TS

Select the correct answer using the code given below.

A) 1 and 4 only B) 1, 2 and 4
C) 2, 3 and 4 D) 1 only
 
Answer & Explanation Answer: A) 1 and 4 only

Explanation:

Q and w are path functions while q+w i.e. H, enthalpy is state function. Similarly, H-TS i.e. G, Gibbs free energy is state function.

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22 108278
Q:

What is the effective resistance (in Ω) of two resistors 21 Ω and 28 Ω connected in parallel?

 

A) 49 B) 24
C) 12 D) 98
 
Answer & Explanation Answer: C) 12

Explanation:
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19 106912
Q:

Fill in the blank with the most appropriate option.

 

18 volts = ___ x 3 ohms

 

A) 6 amperes B) 6 watts
C) 6 milliamperes D) 6 joules
 
Answer & Explanation Answer: A) 6 amperes

Explanation:
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0 102517
Q:

It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?

 

A) Law of inertia B) Newton's second law
C) Newton's third law D) Pascal's law
 
Answer & Explanation Answer: C) Newton's third law

Explanation:
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19 102293
Q:

1 watt is equal to 1 ____________

 

A) J s-1   B) J s
C) J s-2 D) J
 
Answer & Explanation Answer: A) J s-1  

Explanation:
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21 101077
Q:

The working principle of a washing machine is

A) reverse osmosis B) diffusion
C) centrifugation D) dialysis
 
Answer & Explanation Answer: C) centrifugation

Explanation:

The working principle of a washing machine is centrifugation.

 

The_working_principle_of_a_washing_machine_is1542349278.jpg image

 

Centrifugation is a separation process which uses the action of centrifugal force to promote accelerated settling of particles in a solid-liquid mixture.

The washing machine consists of centrifuge for this purpose. A centrifuge is a piece of equipment that puts an object in rotation around a fixed axis, applying a force perpendicular to the axis of spin that can be very strong.

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697 97244
Q:

Which of the following is a bad conductor of heat?

 

A) Wood  B) Diamond
C) Water  D) Mica
 
Answer & Explanation Answer: A) Wood 

Explanation:
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0 94038
Q:

What is the heat released by a heating filament rated 20 W when it is kept on for 2 seconds?

 

A) 40 B) 10
C) 80 D) 20
 
Answer & Explanation Answer: A) 40

Explanation:
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