Download App

Electronics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectronics1 Mark
MCQ
A semiconductor X is made by doping a germanium crystal with arsenic (Z = 33). A second semiconductor Y is made by doping germanium with indium (Z = 49). The two are joined end to end and connected to a battery as shown. Which of the following statements is correct
  • A
    X is P-type, Y is N-type and the junction is forward biased
  • B
     X is N-type, Y is P-type and the junction is forward biased
  • C
     X is P-type, Y is N-type and the junction is reverse biased
  • ✓
     X is N-type, Y is P-type and the junction is reverse biased
✓

Answer

Correct option: D.
 X is N-type, Y is P-type and the junction is reverse biased
X is N-type, Y is P-type and the junction is reverse biased

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Electronics→Electronics — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A silver and a copper voltmeters are connected in parallel across a 6 volt battery of negligible resistance. In half an hour, 1 gm of copper and 2 gm of silver are deposited. The rate at which energy is supplied by the battery will approximately be (Given E.C.E. of copper = $3.294\times 10^{-4}$g/C  and E.C.E. of silver = $1.118 \times 10^{-3}$g/C
→
Inverse square law for illuminance is valid for
→
There exists an electric field of magnitude $E$ in $x$-direction. If the work done in moving a charge of $0.2 \,C$ through a distance of $2 \,m$ along a line making an angle $60^{\circ}$ with $x$-axis is $4 \,J$, then the value of $E$ is ........ $N / C$
→
The distance between the plates of a charged parallel plate capacitor is $5\  cm$ and electric field inside the plates is $200\  Vcm^{-1}$. An uncharged metal bar of width $2\  cm$ is fully immersed into the capacitor. The length of the metal bar is same as that of plate of capacitor. The voltage across capacitor after the immersion of the bar is......$V$
→
Two electric bulbs marked $40\,W,$ $220\,V$ and $60\,W,\,\,220\,V$ when connected in series across same voltage supply of $220\,V,$ the effective power is $P_1$ and when connected in parallel, the effective power is $P_2.$ Then $\frac {P_1}{P_2}$ is
→
A coil has resistance $30$ ohm and inductive reactance $20$ ohm at $50\,\, Hz$ frequency. If an ac source, of $200\,\, volt,\,\, 100\,\, Hz,$ is connected across the coil, the current in the coil will be ......$A$
→
The cause of the potential barrier in a $p-n$ junction diode is
→
A $2\,mW$ laser operates at a wavelength of $500\,nm.$ The number of photons that will be emitted per second is [Given Planck’s constant $h = 6.6 \times 10^{-34}\,Js,$ speed of light $c = 3.0\times 10^8\,m/s$ ]
→
If the wavelength of electromagnetic radiation is doubled, what will happen to the energy of photons?
→
If in hydrogen atom, radius of ${n^{th}}$ Bohr orbit is ${r_n},$ frequency of revolution of electron in ${n^{th}}$ orbit is ${f_n}$ choose the correct option
→