Which one of the following is the dimensionless quantity?

Question

Which one of the following is the dimensionless quantity? (A) Plancks constant (B) Dielectric constant (C) Solid angle (D) Strain

Tardigrade Admin · Accepted Answer

Strain is a pure ratio. The change occurred in unit size of the body is called strain. Since, strain is a ratio, it has no unit. Hence, it is dimensionless.

Q. Which one of the following is the dimensionless quantity?

Plancks constant

Dielectric constant

Solid angle

Strain

Strain is a pure ratio. The change occurred in unit size of the body is called strain. Since, strain is a ratio, it has no unit. Hence, it is dimensionless.