The reading of the ammeter for a silicon diode in the given circuit is
Show Hint
According to Ohm's Law, Voltage (V) = Current (I) × Resistance (R)
- 0
- 15 mA
- 11.5 mA
- 13.5 mA
The Correct Option is C
Approach Solution - 1
According to Ohm's Law, Voltage (V) = Current (I) × Resistance (R)
From the Given equation, V = 3V, R = 200 ohm, I =?
Here, across the diode potential barrier ΔV=0.7 volts
The formula will look like, I=(V−ΔV)/R
Therefore, I= (3−0.7) /200
=0.0115 A
=11.5 mA
Discover More Topics from Chapter: Current Electricity
Approach Solution -2
The Correct Answer is (C): 11.5 mA
Real Life Applications
- Silicon diodes are frequently used to rectify electrical systems, converting alternating current (AC) voltage to direct current (DC) voltage. The AC voltage is changed into a pulsing DC voltage by the diode, which permits current to flow only in one direction. This throbbing DC voltage may then be smoothed down with a filter circuit to provide a stable DC voltage.
- Silicon diodes can be used in voltage regulator circuits to keep the output voltage consistent. The diode conducts more current as the input voltage rises, lowering the output voltage to the desired value. In contrast, when the input voltage falls, the diode conducts less current, causing the output voltage to rise to the required value. Signal detection: Silicon diodes may be used to find and correct weak signals in signal detection circuits. Only one direction of the AC signal can flow through the diode; the resulting rectified DC signal can then be amplified and processed by other electronic parts.
- Silicon diodes can be utilised as overvoltage protection devices to shield delicate electronic components from transient voltage spikes. When a voltage spike occurs, the diode, which is linked in reverse bias across the component, conducts and shunts the excess voltage away from the component, shielding it from harm.
- Silicon diodes can be utilised in electrical circuits as temperature sensors to measure temperature. Temperature changes the forward voltage drop across the diode, which measures temperature.
Question can also be asked as
- What is the current through the silicon diode in the given circuit?
- What is the value of the ammeter reading in the given circuit?
- How much current does the silicon diode in the given circuit conduct?
- What is the forward current of the silicon diode in the given circuit?
- What is the diode current in the given circuit?
Approach Solution -3
The Correct Answer is (C): 11.5 mA
This problem can also be solved by using Kirchoff's Law,
Then the equation will look like, 3-V- I (200) = 0
Here, V = 0.7V
Therefore, 3 - 0.7 - 200I = 0
⇒200I = 2.3
⇒ I = 2.3/200 = 0.0115
So, I = 11.5 mA
Kirchhoff’s Current Law
According to Kirchhoff's Current Law, no charge is wasted and the total current flowing into a junction in an electric circuit equals the charge leaving the node.
Kirchhoff’s Voltage Law
According to Kirchhoff's Voltage Law, the voltage in a closed network is equal to the total of all voltage drops in the loop and is zero.
Use of Kirchhoff’s Laws
In order to simplify the circuits and calculate the quantum of current and voltage in circuits, Kirchhoff's laws or Kirchhoff's rules are used to analyze complicated electrical circuits.
- By using these rules, calculating unknown currents and voltages is simple.
- Kirchhoff's Laws only have one drawback: they can only be used if there isn't a fluctuating magnetic field inside the closed loop, which isn't always the case.
Also Check Out:
Related Articles | ||
|---|---|---|
Learn with videos:
Top Questions on Current electricity
An infinitely long straight wire carrying current $I$ is bent in a planar shape as shown in the diagram. The radius of the circular part is $r$. The magnetic field at the centre $O$ of the circular loop is :
- JEE Main - 2026
- Physics
- Current electricity
- Write the S.I. unit of: (i) Electric potential difference (ii) Resistance
- TBSE Class X Board - 2026
- Physics
- Current electricity
- Why is one of the pins of a three-pin plug relatively thicker?
- TBSE Class X Board - 2026
- Physics
- Current electricity
- State one advantage of using an MCB.
- TBSE Class X Board - 2026
- Physics
- Current electricity
- What is the function of the earth wire?
- TBSE Class X Board - 2026
- Physics
- Current electricity
Questions Asked in JEE Main exam
- Let $\vec{a}=2\hat{i}-\hat{j}-\hat{k}$, $\vec{b}=\hat{i}+3\hat{j}-\hat{k}$ and $\vec{c}=2\hat{i}+\hat{j}+3\hat{k}$. Let $\vec{v}$ be the vector in the plane of $\vec{a}$ and $\vec{b}$, such that the length of its projection on the vector $\vec{c}$ is $\dfrac{1}{\sqrt{14}}$. Then $|\vec{v}|$ is equal to
- JEE Main - 2026
- Vector Algebra
A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol$^{-1}$) led to an elevation of the boiling point by 0.5 K. The relative lowering in the vapour pressure of the solvent 'Y' is $____________ \(\times 10^{-2}\). (nearest integer)
[Given : $K_{b}$ of the solvent = 5.0 K kg mol$^{-1}$]
Assume the solution to be dilute and no association or dissociation of X takes place in solution.- JEE Main - 2026
- Solutions
- The wavelength of photon 'A' is 400 nm. The frequency of photon 'B' is \(10^{16}\,\text{s}^{-1}\). The wave number of photon 'C' is \(10^{5}\,\text{cm}^{-1}\). The correct order of energy of these photons is:
- JEE Main - 2026
- General Chemistry
- Given below are two statements: Statement I: The increasing order of boiling point of hydrogen halides is HCl<HBr<HI<HF. Statement II: The increasing order of melting point of hydrogen halides is HCl<HBr<HF<HI. In the light of the above statements, choose the correct answer from the options given below:
- JEE Main - 2026
- General Chemistry
Inductance of a coil with \(10^4\) turns is \(10\,\text{mH}\) and it is connected to a DC source of \(10\,\text{V}\) with internal resistance \(10\,\Omega\). The energy density in the inductor when the current reaches \( \left(\frac{1}{e}\right) \) of its maximum value is \[ \alpha \pi \times \frac{1}{e^2}\ \text{J m}^{-3}. \] The value of \( \alpha \) is _________.
\[ (\mu_0 = 4\pi \times 10^{-7}\ \text{TmA}^{-1}) \]- JEE Main - 2026
- Ray optics and optical instruments
Concepts Used:
Current Electricity
Current electricity is defined as the flow of electrons from one section of the circuit to another.
Types of Current Electricity
There are two types of current electricity as follows:
Direct Current
The current electricity whose direction remains the same is known as direct current. Direct current is defined by the constant flow of electrons from a region of high electron density to a region of low electron density. DC is used in many household appliances and applications that involve a battery.
Alternating Current
The current electricity that is bidirectional and keeps changing the direction of the charge flow is known as alternating current. The bi-directionality is caused by a sinusoidally varying current and voltage that reverses directions, creating a periodic back-and-forth motion for the current. The electrical outlets at our homes and industries are supplied with alternating current.