Right Answer: A binary counter is a digital circuit that counts in binary numbers. It consists of flip-flops, typically D or T flip-flops, arranged in a series. Each flip-flop represents a bit of the binary number. When a clock pulse is applied, the least significant bit (LSB) toggles from 0 to 1 or from 1 to 0. When it overflows (from 1 to 0), it triggers the next flip-flop to toggle, effectively counting in binary. This continues through all the flip-flops, allowing the counter to count up in binary from 0 to its maximum value (2^n - 1, where n is the number of flip-flops).