A microprocessor is capable of addressing 64 K bytes of

A microprocessor is capable of addressing 64 K bytes of memory. Its address bus width is—

In order to calculate no. of bits
64 K = 2ⁿ
or 64 × 1024 = 2ⁿ
or 2⁶ × 2¹⁰ = 2ⁿ
or 2¹⁶ = 2ⁿ
or n = 16