MCQ
The resistance of a reverse biased $P-N$ junction diode is about
  • A
    $1\ \mathrm{ohm}$
  • B
    $10^2\ \mathrm{ohm}$
  • C
    $10^3 \mathrm{ohm}$
  • $10^6 \mathrm{ohm}$

Answer

Correct option: D.
$10^6 \mathrm{ohm}$
$10^6 \mathrm{ohm}$

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

Similar questions

Switch $S$ of the circuit shown in figure. is closed at $t = 0.$ If $e$ denotes the induced

$emf$ in $L$ and $i,$ the current flowing through the circuit at time $t,$ which of the following graphs is correct 
Huygen’s principle of secondary wavelets may be used to(a) Find the velocity of light in vacuum (b) Explain the particle behaviour of light(c) Find the new position of the wavefront(d) Explain photoelectric effect
 
 
 
 
What is the S.I. unit of electric potential? 
The continuous X-rays spectrum produced by an X-ray machine at constant voltage has(a) A maximum wavelength(b) A minimum wavelength(c) A single wavelength(d) A minimum frequency
   
   
Two conducting circular loops F and G are kept in a plane on either side of a straight current-carrying wire as shown in the figure below.
If the current in the wire decreases in magnitude, the induced current in the loops will be:
In a potentiometer experiment two cells of $\text{e.m.f.} \ E_1$ and $E_2$ are used in series and in conjunction and the balancing length is found to be $58 \ cm$ of the wire. If the polarity of $E_2$ is reversed, then the balancing length becomes $29 \ cm .$ The ratio $\frac{E_1}{E_3} f$ the $\text{e.m.f.}$ of the two cells is
Positive rays consists of(a) Electrons (b) Neutrons (c) Positive ions (d) Electro magnetic waves
   
   
A solenoid has an inductance of $60$ henrys and a resistance of $30$ ohms. If it is connected to a $100$ volt battery, how long will it take for the current to reach $\frac{e{-1}}{e} \approx 63.2 \%$  of its final value
Which of the following, the most suitable material for making permanent magnet is(a) Steel (b) Soft iron(c) Copper(d) Nickel
       
The value of electric permittivity of free space is: