Assuming in forward bias condition there is a voltage drop of $0.7 \text{ V}$ across a silicon diode, the current through diode $D_1$ in the circuit is ________$\text{mA}$.
(Assume all diodes in the given circuit are identical)
To find the current through diode \(D_1\) in the given circuit, follow these steps:
The circuit consists of three silicon diodes in parallel, each with a forward voltage drop of \(0.7 \, \text{V}\). The supply voltage is \(12 \, \text{V}\), and a resistor \(R_1 = 0.3 \, \text{k}\Omega\) is connected in series.
Since the diodes are identical and connected in parallel, the same forward voltage drop will be across all diodes. Therefore:
- Calculate the voltage across \(R_1\):
\(V_R = V_{\text{total}} - V_{\text{diode}} = 12 \, \text{V} - 0.7 \, \text{V} = 11.3 \, \text{V}\) - Calculate the current through the resistor \(R_1\) using Ohm's Law:
\(I = \frac{V_R}{R_1} = \frac{11.3 \, \text{V}}{0.3 \, \text{k}\Omega} = \frac{11.3}{300} \, \text{A}\)
\(= 0.03767 \, \text{A} \approx 37.67 \, \text{mA}\) - Since the diodes are identical and in parallel, the current will be evenly split among the three diodes. Thus, the current through diode \(D_1\) is:
\(I_{D_1} = \frac{37.67 \, \text{mA}}{2} = 18.8 \, \text{mA}\)
Hence, the current through diode \(D_1\) is approximately 18.8 mA.
Similar Questions
- The ratio of de Broglie wavelength of a deutron with kinetic energy $E$ to that of an alpha particle with kinetic energy $2E$, is $n : 1$. The value of $n$ is ________.
(Assume mass of proton = mass of neutron) : - The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series.
(R = Rydberg constant) - 7.9 MeV $\alpha$-particle scatters from a target material of atomic number 79. From the given data the estimated diameter of nuclei of the target material is (approximately) _________ m.
$\left[ \frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \text{ Nm}^2/\text{C}^2 \text{ and electron charge} = 1.6 \times 10^{-19} \text{ C} \right]$ Find the correct combination of A, B, C and D inputs which can cause the LED to glow.
- The minimum frequency of photon required to break a particle of mass 15.348 amu into 4 $\alpha$ particles is _________ kHz.
[mass of He nucleus = 4.002 amu, $1 \text{ amu} = 1.66 \times 10^{-27} \text{ kg}, h = 6.6 \times 10^{-34} \text{ J.s} \text{ and } c = 3 \times 10^8 \text{ m/s}$] The correct truth table for the given input data of the following logic gate is :
- Light is incident on a metallic plate having work function $110 \times 10^{-20} \text{ J}$. If the produced photoelectrons have zero kinetic energy then the angular frequency of the incident light is _________ rad/s.
(h = $6.63 \times 10^{-34} \text{ J.s}$). - The smallest wavelength of Lyman series is 91 nm. The difference between the largest wavelengths of Paschen and Balmer series is nearly _________ nm.
- Two electrons are moving in orbits of two hydrogen like atoms with speeds $3 \times 10^5 \text{ m/s}$ and $2.5 \times 10^5 \text{ m/s}$ respectively. If the radii of these orbits are nearly same then the possible order of energy states are ______ respectively.
- Given below are two statements:
Statement I: For all elements, greater the mass of the nucleus, greater is the binding energy per nucleon.
Statement II: For all elements, nuclei with less binding energy per nucleon transforms to nuclei with greater binding energy per nucleon.
In the light of the above statements, choose the correct answer from the options given below
Important Questions from Modern Physics
- The ratio of de Broglie wavelength of a deutron with kinetic energy $E$ to that of an alpha particle with kinetic energy $2E$, is $n : 1$. The value of $n$ is ________.
(Assume mass of proton = mass of neutron) : - The wave numbers of three spectral lines of H atom are considered. Identify the set of spectral lines belonging to Balmer series.
(R = Rydberg constant) - 7.9 MeV $\alpha$-particle scatters from a target material of atomic number 79. From the given data the estimated diameter of nuclei of the target material is (approximately) _________ m.
$\left[ \frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \text{ Nm}^2/\text{C}^2 \text{ and electron charge} = 1.6 \times 10^{-19} \text{ C} \right]$ Find the correct combination of A, B, C and D inputs which can cause the LED to glow.
- The minimum frequency of photon required to break a particle of mass 15.348 amu into 4 $\alpha$ particles is _________ kHz.
[mass of He nucleus = 4.002 amu, $1 \text{ amu} = 1.66 \times 10^{-27} \text{ kg}, h = 6.6 \times 10^{-34} \text{ J.s} \text{ and } c = 3 \times 10^8 \text{ m/s}$]
