Q. Inputs to a NAND gate are and are made as below.
image
Output of the NAND gate is
image

 129  192 Semiconductor Electronics: Materials Devices and Simple Circuits Report Error

Solution:

For an NAND gate, truth table is
image
Input Out put
0 0 1
0 1 1
1 0 1
1 1 0

So, no output occurs when both inputs are at higher potentials (1). Till time , output (1) occurs because both inputs do not become (1) together.