Serial communication transmits data one bit after another sequentially over a single channel
The time required to transmit one bit is given as the bit interval = 10 \(\mu\)s
An 8-bit word consists of 8 bits
Since the bits are transmitted sequentially, the total time required to transmit the 8-bit word is the number of bits multiplied by the time per bit
Total time = (Number of bits) \(\times\) (Time per bit)
Total time = 8 bits \(\times\) 10 \(\mu\)s/bit = 80 \(\mu\)s