Physics Test - 13

To convert C3 into hexadecimal, we will write down the respective values of C 12 and 3 into 4-digit binary form.

12 - 1100

3 - 0011

Hence, C3 - 11000011

2⁵ = (32)10

(32)₁₀ = (40)₈

A universal gate is a gate that can implement any Boolean function without the need to use any other gate type. The NAND and NOR gates are universal gates. They can be combined to produce AND, OR and NOR gate.

(i) NOR gates can be converted into the NOT gate by just connecting the inputs of a NOR gate. As a NOR gate is equivalent to an OR gate leading to NOT gate, this is automatically seen to the OR part of the NOR gate, eliminating it from consideration and leaving only the NOT part.

(ii) To convert the NOR into the OR gate, connect by just connecting the NOT gate followed to the NOR gate. As a result, outputs of this gate are opposite to that of the OR gate when the inputs are kept the same.

(iii) An AND gate gives the output as 1 when both of its inputs are 1. Therefore, an AND gate is made by inverting the inputs of a NOR gate.

(iv) A NAND gate can be converted into the NOT gate, by just connecting the inputs of NAND gates together.

(v) Not only AND, OR, and NOT gates, we can also combine the NAND gates to perform the EX-OR and NOR operations too.

Truth table of EX - NOR Gate is

Hence only option 2 satisfies.

An AND gate always produces an output 1, only when all the inputs are 1.

We can check from options and only option 2 satisfies the given truth table.

There are different charge carriers in case of a metal and a semiconductor. Resistance depends upon the number of charge carriers present. So, resistance variation is there due to charge carrier variation.