Question
In an LED device, the intensity of emitted light:
✓
Answer
- Increases continuously with the forward current of the diode, reaches a maximum and then decreases.
The intensity of emitted light increase with the foreword current more the light intensity.
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
More "M.C.Q (1 Marks)" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→
Similar questions
A radioactive substance emits(a) Electromagnetic radiation(b) Electrons revolving around the nucleus(c) Charged particles(d) a,c
Assertion : Short wave bands are used for transmission of ratio waves to a large distance
Reason : Short waves are reflected by ionosphere(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If assertion is false but reason is true.
Reason : Short waves are reflected by ionosphere(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If assertion is false but reason is true.
1 milli coulomb =
Value of potential at a point due to a point charge is (a) Inversely proportional to square of the distance(b) Directly proportional to square of the distance(c) Inversely proportional to the distance(d) Directly proportional to the distance
The adjoining figure shows an $AC$ circuit with resistance $R,$ inductance $L$ and source voltage $Vs$. Then.
→Diffusion current in a p-n junction is greater than the drift current in magnitude:
- If the junction is forward-biased.
- If the junction is reverse-biased.
- If the junction is unbiased.
- In no case.
A nuclear bomb exploded 200 km above the surface of moon. The sound of explosion on the moon(a) Will heard before the explosion is seen(b) Will be heard at the same time(c) Will be heard after explosion(d) Will not heard at all
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5eV to 0.8eV. The work function of the metal is?
A semiconducting device is connected in a series circuit with a battery and a resistance. A current is found to pass through the circuit. If the polarity of the battery is reversed, the current drops to almost zero. the device may be:
Consider the following two statements $A$ and $B$ and identify the correct choice given in the answers
$(A)$ Duddells thermo$-$galvanometer is suitable to measure direct current only
$(B)$ Thermopile can measure temperature differences of the order of $10^{-3}{ }^{\circ} \mathrm{C}$
→$(A)$ Duddells thermo$-$galvanometer is suitable to measure direct current only
$(B)$ Thermopile can measure temperature differences of the order of $10^{-3}{ }^{\circ} \mathrm{C}$