NEET Physics Questions Solved

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

(1)

Where K is thermal conductivity

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

mcxGy.hzML°T°=LT-1x.M-1L3T-2y.ML2T-1zML°T°=M-y+z.Lx+3y+2z.T-x-2y-zOn comparing dimensions on both sides:       -y+z=1                  ........i       x+3y+2z=0           ........ii       -x-2y-z=0          ........iiiii+iii-    y+z=0                     y=-zput it in euqation i                     +z+z=1                     z=+12                     y=-12                     x=12Hence m c12G-12h12

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

Surface tension S =ForceLength=MLT-2L=MT-2Let  Surface tension S =k ExVyTzPutting dimensions on both sides,[MT-2] = [ML2T-2]x[LT-1]y[T]zComparing powers  of M, L and T on both sides1 =x                                   ....... Power of M0 =2x + y                                    ..... Power of L            y= -2x = -2   -2 = -2x -y +z                   ........... ..... Power of Zz= 2x +y -2    =2 -2 -2 = -2Putting values of x, y and z in above formulaS =k E1V-2T-2

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

V =LitTherefore , L =Vti

Also, V=iRTherefore R =Vi

so, LR= VtiVi=t

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

(3)

Electrostatic pressure = 12oE2Dimension of Pressure = ML-1T-2Electromagnetic energy per unit volume = B22μoDimension = EnergyVolume=ML2T-2L3 =ML-1T-2    same as pressure

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Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

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PMT - 1989

Light year is a unit of    

(1) Time

(2) Mass

(3) Distance

(4) Energy

Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

(3) Light year is a distance which light travels in one year.

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The magnitude of any physical quantity

(1) Depends on the method of measurement

(2) Does not depend on the method of measurement

(3) Is more in SI system than in CGS system

(4) Directly proportional to the fundamental units of mass, length and time

Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

(2) Because magnitude is absolute.

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PMT - 1990

Which of the following is not equal to watt 

(1) Joule/second

(2) Ampere × volt

(3) (Ampere)2 × ohm

(4) Ampere/volt

Concept Videos :-

#1 | Basic Concepts & Examples
#2 | Dimensional Analysis : Remaining

Concept Questions :-

(4)

Power=EnergyTime = Joule/second  = WattAlso for resistance R, Power = Voltage X Current =Ampere × volt =WattAlso, Voltage = Current X Resistance Power = Current2 X Resistance = Ampere2 × Ohm = Watt

 

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