Question
In Fig., assuming the diodes to be ideal:
✓
Answer
A symbol of the diode is represented like this : In this problem first we have to check the polarity of the diodes. $-10$ is the lower voltage in the circuit.
Now $p-$side of $p-n$ juction $D_1$ is connected to lower voltage and $n-$side of $D_1$ to higher voltage.
Thus $D_1$ is reverse biased.
Now, let us analyse $2^{nd}$ diode of the given circuit.
The $p-$side of $p-n$ junction $D_1$ is at higher potential and $n-$side of $D_2$ is at lower potential.
Therefore $D_2$ is forward biased.
Hence, current flows through the jucntion from $B$ to $A$.
Now $p-$side of $p-n$ juction $D_1$ is connected to lower voltage and $n-$side of $D_1$ to higher voltage.
Thus $D_1$ is reverse biased.
Now, let us analyse $2^{nd}$ diode of the given circuit.
The $p-$side of $p-n$ junction $D_1$ is at higher potential and $n-$side of $D_2$ is at lower potential.
Therefore $D_2$ is forward biased.
Hence, current flows through the jucntion from $B$ to $A$.
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
What is the SI unit of self-inductance?
The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122nm. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is?
The equivalent energy to 1 amu is :
The maximum illumination on a screen at a distance of 2 m from a lamp is 25 lux. The value of total luminous flux emitted by the lamp is(a) 1256 lumen(b) 1600 lumen(c) 100 candela(d) 400 lumen
A discharge takes place between the two electrodes on applying the electric field to the gas in the discharge tube. The cause of this fluorescence was attributed to?
A rectangular coil of 20 turns and area of cross- section 25 sq cm has a resistance of 100 ohm. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of 1000 Tesla per second, the current in the coil is(a) 1.0 ampere(b) 50 ampere(c) 0.5 ampere(d) 5.0 ampere
Two magnets of same size and mass make respectively 10 and 15 oscillations per minute at certain place. The ratio of their magnetic moments is(a) 4 : 9(b) 9 : 4(c) 2 : 3 (d) 3 : 2
Energy in a current carrying coil is stored in the form of:
Figure shows some equipotential lines distributed in space. A charged object is moved from point A to point B.
A plane glass slab is kept over various coloured letters, the letter which appears least raised is(a) Blue (b) Violet(c) Green (d) Red