Download App

Electronics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectronics1 Mark
MCQ
The maximum efficiency of full wave rectifier is
  • A
    $100 \%$
  • B
    $25.20 \%$
  • C
    $40.2 \%$
  • ✓
    $81.2 \%$
✓

Answer

Correct option: D.
$81.2 \%$
$\text { For full wave rectifier } \eta=\frac{81.2}{1+\frac{r_f}{R_L}} $
$ \Rightarrow n_{\max }=81.2 \% \quad(r \ll R)$

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 "MCQ" from Electronics→Electronics — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

The energy band gap of $S i$ is
→
A beam of plane polarized light falls normally on a polarizer of cross sectional area $3 \times 10^{-4} m ^2$. Flux of energy of incident ray in $10 W$. The polarizer rotates with an angular frequency of $31.4 rad / sec$. The energy of light passing through the polarizer per revolution will be
→
Using a bar magnet $P$, a vibration magnetometer has time period 2seconds. When a bar $Q$ (identical to $P$ in mass and size) is placed on top of $P$, the time period is unchanged. Which of the following statements is true
→
A galvanometer, having a resistance of $50 \Omega$ gives a full scale deflection for a current of $0.05 A$. The length in meter of a resistance wire of area of cross-section $2.97 \times 10 \mathrm{~cm}$ that can be used to convert the galvanometer into an ammeter which can read a maximum of $5 \mathrm{~A}$ current is (Specific resistance of the wire $=5 \times 10^{-7} \Omega \mathrm{m}$ )
→
A man sitting in a moving train hears the whistle of the engine. The frequency of the whistle is $600 \mathrm{~Hz}$
→
The radiation energy density per unit wavelength at a temperature $T$ has a maximum at a wavelength $\lambda$. At temperature $2 T$, it will have a maximum at a wavelength
→
A rubber ball is dropped from a height of $5 \mathrm{~m}$ on a planet where the acceleration due to gravity is not known. On bouncing, it rises to $1.8 \mathrm{~m}$. The ball loses its velocity on bouncing by a factor of
→
The temperature of equal masses of three different liquids $A, B$ and $C$ are $12^{\circ} \mathrm{C}, 19^{\circ} \mathrm{C}$ and $28^{\circ} \mathrm{C}$ respectively. The temperature when $A$ and $B$ are mixed is $16^{\circ} \mathrm{C}$ and when $B$ and $C$ are mixed is $23^{\circ} \mathrm{C}$. The temperature when $A$ and $C$ are mixed is
→
A machine gun fires a bullet of mass $40 g$ with a velocity $1200 ms ^{-1}$. The man holding it can exert a maximum force of $144 N$ on the gun. How many bullets can he fire per second at the most
→
In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is
→