AP EAPCET 23-Aug-2021 Shift 2 Paper

(a) Chromium (Z=24)
Electronic configuration (EC)=[Ar]3d54s1Number of unpaired electrons in Cr =6
(b) Iron (Z=26)
EC=[Ar]3d64s2 Number of unpaired electrons =4
(c) Manganese (Z=25)
EC=[Ar]3d54s2Number of unpaired electrons =5
We know that a pn-junction diode is operated in forward bias only.
∴ For positive half cycle, the circuit will look like,Here, only D2 is ON and D1 of OFF.
∴ Voltage drop across AB=CD=10V
By using voltage division rule.
Output voltage, across CE (i.e. across 2kΩ)
V0=

Vi×2

2+2

=

10×2

4

=5V