A light emitting diode (LED) has a volta...

A light emitting diode `(LED)` has a voltage drop of `2V` across it and passes a current of `10 mA`. When it operates with a `6V` battery through a limiting resistor `R`. The value of `R` is

`40kOmega`

`4kOmega`

`200Omega`

`400Omega`

Text Solution

Verified by Experts

The correct Answer is:

`V_(net)=IRimplies4=10xx10^(-3)xxR=R=400Omega`

Topper's Solved these Questions

ELECTRONICS
ERRORLESS|Exercise Assertion & Reason|26 Videos
ELECTRONICS
ERRORLESS|Exercise NCERT Based Questions (Digital Electronics)|23 Videos
ELECTRON, PHOTON, PHOTOELECTRIC EFFECT & X -RAY
ERRORLESS|Exercise ASSERTION & REASON|27 Videos
ELECTROSTATICS
ERRORLESS|Exercise ASSERTION & REASON|25 Videos

Similar Questions

Explore conceptually related problems

A light-emitting diode (LED) has a voltage drop of 2V across it and passes a current of 10 muA , when it operates with a 6V battery with a limiting resistor R. what is the value of R ?

A light emitting diode has a voltage drop of 2 v across it and passes a current of 10muA . When it operates with a 6 v battery through a limiting resistor R, the value of R is

A P-N junction diode can withstand currents up to 10 mA . Under forward bias, The diode has a potential drop of 0.5 V across it which is assumed to be independent of current. The maximum voltage of the battery used to forward bias the diode when a resistance of 200 Omega is connected in series with it is

An n-p-n transistor in a common - emitter mode is used as a simple voltage amplifier with a collector current of 4 mA. The positive terminal of a 8 V battery is connected to the collector through a load resistance R_L and to the base through a resistance R_B . The collector - emitter voltage V_(CE) = 4 V , the base - emitter voltage V_(BE) = 0.6 V and the current amplification factor beta = 100 . Calculate the values of R_L and R_B .

A diode made of silicon has a barrier potential of 0.7 V and a current of 20 mA passes through the diode when a battery of emf 3 V and a resistor is connected to it. The wattage of the resistor and diode are

ERRORLESS-ELECTRONICS-Past years questions

Barrier potential of a p-n junction diode does not depend on
Text Solution
|
The barrier potential of a p-n junction depends on : (i) type of semic...
Text Solution
|
A light emitting diode (LED) has a voltage drop of 2V across it and pa...
Text Solution
|
Two ideal diodes are connected to a battery as shown in the circuit. T...
Text Solution
|
Consider the junction diode as ideal. The value of current flowing thr...
Text Solution
|
Current in the circuit will be
Text Solution
|
In the given figure, a diode D is connected to an external resistance ...
Text Solution
|
The given circuit has two ideal diodes connected as show in the figure...
Text Solution
|
Which one of the following represents forward bias diode?
Text Solution
|
For transistor action which of the following statement are correct (...
Text Solution
|
The minimum potential difference between the base and emitter required...
Text Solution
|
One way in which the operation of an npn transistor differ from that o...
Text Solution
|
In case of NPN-transistor the collector current is always less than th...
Text Solution
|
A transistor is operated in common emitter configuration at V(c)=2 V s...
Text Solution
|
In a common emitter transistor, the current gain is 80. What is the ch...
Text Solution
|
Consider an n-p-n transistor amplifer in common-emitter configuration....
Text Solution
|
An amplifier has a voltage gain A(V)=1000. The voltage gain in dB is
Text Solution
|
A common emitter amplifier has a voltage gain of 50, an input impedanc...
Text Solution
|
A common emitter amplifier gives an output of 3 V for an input of 0.01...
Text Solution
|
The input resistance of a common emitter transistor amplifier, if the ...
Text Solution
|