Class XI

According to the principle of homogeneity of dimensions
  1. we can add or subtract any physical quantities
  2. we can add or subtract any physical quantities
  3. we can add or subtract similar physical quantities
  4. we can subtract similar physical quantities
Electric charge is expressed in SI units as
  1. derived unit
  2. Real unit
  3. complex unit
  4. a base unit
The units of pressure are the same as the units of
  1. stress
  2. plasticity
  3. strain
  4. elasticity
A dimensionally consistent equation
  1. is necessarily correct
  2. is not necessarily correct
  3. is always correct
  4. is nearly correct
The dimensions of a physical quantity are
  1. the sum of all the number of base quantities
  2. the powers (or exponents) to which the base quantities are raised to represent that quantity
  3. the sum of all the number of base quantities
  4. the sum of the exponents of base quantities
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