Q.

If P represents radiation pressure, C represents speed of light and Q represents radiation energy striking a unit area per second, then the non-zero integers x, y and z, such that PxQyCz is dimensionless are

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a

x=1, y=1, z=1

b

x=1, y=-1, z=1

c

x=-1, y= 1,  z= 1

d

x=1,  y=1,  z=-1

answer is B.

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Detailed Solution

M0L0 T0 =PxQyCz                        = (M L-1 T-2) x(MT-3)y(LT-1)z                          x + y = 0 or  x = -y                           -x +z = 0        or,x= z
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