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 Physics Questions

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Q:

General purpose utility gloves are

A) for surgeries B) for cleaning procedures
C) for handling tubes D) All of the above
 
Answer & Explanation Answer: B) for cleaning procedures

Explanation:

General purpose gloves - utility gloves are recommended for cleaning procedures, such as handling soiled linens or decontaminating care areas. Utility gloves are more tear and puncture resistant than other gloves.

utility_gloves1532521373.jpg image

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Q:

Thermoplastic materials are those materials which

A) Do not become hard with the application of heat and pressure and no chemical change occurs B) Are flexible and can withstand considerable wear under suitable conditions
C) Are formed into shape under heat and pressure and results in a permanently hard product D) Are used as a friction lining for clutches and brakes
 
Answer & Explanation Answer: A) Do not become hard with the application of heat and pressure and no chemical change occurs

Explanation:

Thermoplastic materials is a type of plastic material that can be cooled and heated several times without any change in their chemistry or mechanical properties.

 

Examples of Thermoplastic ::

 

  • polyethylene,
  • polypropylene,
  • polyvinyl chloride,
  • polystyrene,
  • polybenzimidazole,
  • acrylic,
  • nylon and
  • teflon
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Q:

The characteristic of ____ is used in the breaking pads of cars.

A) negative effect of friction B) zero effect of friction
C) weight impulse force tension action D) positive effect of friction
 
Answer & Explanation Answer: D) positive effect of friction

Explanation:
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Q:

Scalar Quantities are

A) physical quantities which have magnitude only and no direction B) physical quantities which have no magnitude only and only direction
C) physical quantities which have magnitude only and direction D) physical quantities which have no magnitude and no direction
 
Answer & Explanation Answer: A) physical quantities which have magnitude only and no direction

Explanation:
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Q:

What is unit of Viscosity ?

A) coulomb B) newton second per square meter
C) watt per meter per degree celcius D) joule per kilogram per Kelvin
 
Answer & Explanation Answer: B) newton second per square meter

Explanation:

coulomb is unit of Electric Charge,

watt per meter per degree celcius is unit of Thermal Conductivity,

joule per kilogram per Kelvin is unit of Specific Heat capacity.

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2 3369
Q:

A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and length lis taken and the two wires  are  joined  in  a  parallel  combination. The  resultant  resistance   of  the  parallel combination of the two wires will be

A) 5 R B) 5 R/4
C) 4 R/5 D) R/5
 
Answer & Explanation Answer: D) R/5

Explanation:

1st copper wire: R = pl/A = pl/ πr2

2ndcopper wire: R’ = p’l’/A’ = pl/(4 πr2) = R/4

If joined in parallel, (1/Req) = (1/R) + (1/R’)

= 1/R + 4/R1/Req= 5/R

Req= R/5

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Q:

Which statement best describes an igneous intrusion?

A) Igneous intrusion for when ice crystals splash into lava B) Magma is injected into surrounding rock forming an igneous intrusive
C) Magma is exported to an open area and forms iron D) Magma explodes to the surface and forms a smooth outer layer of rock
 
Answer & Explanation Answer: B) Magma is injected into surrounding rock forming an igneous intrusive

Explanation:

Magma is injected into surrounding rock forming an igneous intrusive.

 

Actually it is a plutonic formation in which magma present beneath Earth surface deforms the shape of rocks present above it
 

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Q:

The GPS device in an automobile uses which communication channel?

A) Satellite B) Microwave
C) Radio frequency D) Infrared
 
Answer & Explanation Answer: A) Satellite

Explanation:

All automobiles uses satellite communication channel for their GPS devices.

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