Question : When two semiconductors of p- and n-type are brought in contact, they form the p-n junction, which acts like a/an

Option 1: conductor

Option 2: oscillator

Option 3: rectifier

Option 4: amplifier

Question : Which are the four quantum numbers for an electron present in 4f orbital?

Option 1: n=4, I=3, m=+1, s=+1 / 2

Option 2: n=3, I=2, m=-2, s=+1 / 2

Option 3: n=4, I=4, m=-4, s=-1 / 2

Option 4: n=4, I=3, m=+4, s=+1 / 2

Question : The remainder of the term $9+9^2+\ldots+9^{(2 n+1)}$ when divided by 6 is:

Option 1: 1

Option 2: 4

Option 3: 2

Option 4: 3

Question : Silicon doped with gallium forms_________.

Option 1: n-type semiconductor

Option 2: superconductor

Option 3: insulator

Option 4: p-type semiconductor

Question : If $m^2-n^2=21$ and $m - n = 3$, find the value of $m + n$.

Option 1: 7

Option 2: 4

Option 3: 24

Option 4: 18

Question : In a star network, how many lines are required for connecting N nodes to the host node?

Option 1: N + 1

Option 2: N/2

Option 3: (N/2) – 1

Option 4: N – 1