MCQ
Different voltages are applied across a $P-N$ junction and the currents are measured for each value. Which of the following graphs is obtained between voltage and current
- A
- B
- ✓
- D
✓
Answer
Correct option: C.
c
(c)$PN$ junction has low resistance in one direction of potential difference $+V$, so a large current flows (forward biasing). It has a high resistance in the opposite potential difference direction $-V$, so a very small current flows (Reverse biasing).
(c)$PN$ junction has low resistance in one direction of potential difference $+V$, so a large current flows (forward biasing). It has a high resistance in the opposite potential difference direction $-V$, so a very small current flows (Reverse biasing).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The apparent wavelength of the light from a star moving away from the earth is $0.01\%$ more than its real wavelength. Then the velocity of star is......$km/sec$
→A neutron collides head-on with a stationary hydrogen atom in ground state. Which of the following statements are correct (Assume that the hydrogen atom and neutron has same mass) :
A capacitor of capacitance C is charged to a potential V. The flux of the electric field through a closed surface enclosing the capacitor is:
A steady current of 5 amps is maintained for 45 mins. During this time it deposits 4.572 gms of zinc at the cathode of a voltameter. E.C.E. of zinc is
A potentiometer wire $PQ$ of $1\,m$ length is connected to a standard cell $E _{1}$. Another cell $E _{2}$ of emf $1.02\, V$ is connected with a resistance $'r'$ and switch $S$ (as shown in figure). With switch $S$ open, the null position is obtained at a distance of $49\, cm$ from $Q$. The potential gradient in the potentiometer wire is.......$V/cm$
→Three point charges are placed at the corners of an equilateral triangle. Assuming only electrostatic forces are acting
If frequency of the incident photon on the metal surface is made double, then kinetic energy of the emitted photoelectron will become :
The intensity of the field generated at a point due to an electric dipole is directly proportional to:
Three identical charged balls each of charge $2 \,C$ are suspended from a common point $P$ by silk threads of $2 \,m$ each (as shown in figure). They form an equilateral triangle of side $1 \,m$.
→The ratio of net force on a charged ball to the force between any two charged balls will be ...........
A particle of mass 0.6 g and having charge of 25 nC is moving horizontally with a uniform velocity $1.2\times 10^4$ ms$^{-1}$ in a uniform magnetic field, then the value of the magnetic induction is (g = 10 ms$^{-2}$)
→