The net charges on $\mathrm{p}$-type semiconductor and $\mathrm{n}$-type semiconductor are, respectively:

1. Positive, negative

2. Negative, positive

3. Positive, positive

4. Zero, zero

In which of the following condition, diffusion current in $p-n$ junction is more than drift current?

What is the reading of the ideal ammeters A₁ and A₂ connected in the given circuit diagram, if $\mathrm{p}-\mathrm{n}$ junction diodes are ideal?

1. 2 A and zero

2. 3 A and 2 A

3. 2 A and 3 A

4. Zero and 2 A

If in a reverse-biased $p-n$ junction, an increase in carrier concentration takes place due to the creation of new hole-electron pairs by the light of wavelength less than or equal to 620 nm, then the bandgap is:

1. 1 eV

2. 2 eV

3. 20 eV

4. 0.2 eV

Which of the following graphs may correctly represent the variation of current (l) with potential difference (V) across a zener diode?

1.		2.
3.		4.

Which of the following statements is incorrect about LED?

A combination of logic gates is shown in the circuit. If \(A\) is at \(0\) V and \(B\) is at \(5\) V, then the potential of \(R\) is:

1. \(0\) V
2. \(5\) V
3. \(10\) V
4. Any of these

How many minimum number of NOR gates are required to obtain an AND gate?

1. One

2. Two

3. Three

4. Five

The circuit shown below is an electrical analogue for which of the following logic gates?
        

1. AND gate

2. OR gate

3. NOT gate

4. NOR gate

What is the equivalent resistance across the terminals of the battery if the diodes are ideal?