A PN junction diode when forward biased has a drop of 0.5 V which is assumed to be independent of current. The current in excess of 10 mA through the diode produces large joule heating which damages the diode. If we diode, the resistor used in series with the diode so that the maximum current does not exceed 5 mA

The diode used in the circuit shown in the adjacent figure has a constant voltage drop of 0.5V at all currents and a maximum power rating of 100mW.What should be the value of resistor R connected in series with the diode for obtaining maximum current?

In a forward biased silicon diode, current occurs at close to 0.7 V and increase rapdily wiht very small further potential difference increase. What current will flow, when there is a 200 ohm resistor in series with the diode with a 10 V battery across the series combination?

Assume that the silicon diode in the circui shown in fig. requires a minimum current of 1mA to be above the knee point (0.7V) of its I-V characteristics. Aslo assume that the voltage across the diode is independent of current above the knee point. What is the power dissipated in the resistance R and in the diode, when a current of 5mA flows in the circuit at V_(B)=6V ?

In a p-n junction diode, the current I can be expressed as I = I_0 exp ((eV)/(2k_BT)) where I_0 is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_B is the Boltzmann constant (8.6xx 10^-5 (eV)/K) and T is the absolute temperature. If for a given diode I_0 = 5 xx 10^-12 A and T = 300 K, then - What will be the increase in the current if the voltage across the diode is increased from 0.6 V to 0.7 V?

In a p-n junction diode, the current I can be expressed as I = I_0 exp ((eV)/(2k_BT)) where I_0 is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_B is th Boltzmann constant (8.6xx 10^-5 (eV)/K) and T is the absolute temperature. If for a given diode I_0 = 5 xx 10^-12 A and T = 300 K, then - What is the dynamic resistance when the voltage is increased to 0.7 V from 0.6 V?

In a p-n junction diode, the current I can be expressed as I = I_0 (exp ((eV)/(2k_BT))-1) where I_0 is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_B is th Boltzmann constant (8.6xx 10^ -5 eV/K) and T is the absolute temperature. If for a given diode I_0 = 5 xx 10^ -12 A and T = 300 K, then - What will be the forward current at a forward voltage of 0.6 V?

In a p-n junction diode, the current I can be expressed as I = I_0 (exp ((eV)/(2k_BT))-1) where I_0 is called the reverse saturation current, V is the voltage across the diode and is positive for forward bias and negative for reverse bias, and I is the current through the diode, k_B is th Boltzmann constant (8.6xx 10^-5 eV/K) and T is the absolute temperature. If for a given diode I_0 = 5 xx 10^ -12 A and T = 300 K, then - What will be the current if reverse bias voltage changes from 1 V to 2 V?

A 10V zener diode along with a series resistance is connected across a 40V supply. Calculate the minimum value of the resistance required. If the maximum zener current in 50mA.

A small retangular coil ABCD contains 140 turns of wire. The sides AB and BC of the coil are of length 4.5 and 2.8 cm respectively, as shown in the figure The coil is held between the poles of a large magnet so that the coil can rotate about an axis thorugh its centre. The magnet produces a uniform magnetic field of flux density B between its poles. When the current in the coil is 170 mA, the maximum torque produced in the coil is 2.1 xx 10^-3 N m . Use your answer to show that the magnetic flux density B between the poles of the magnet is 70 mT.

A small retangular coil ABCD contains 140 turns of wire. The sides AB and BC of the coil are of length 4.5 and 2.8 cm respectively, as shown in the figure The coil is held between the poles of a large magnet so that the coil can rotate about an axis thorugh its centre. The magnet produces a uniform magnetic field of flux density B between its poles. When the current in the coil is 170 mA, the maximum torque produced in the coil is 2.1 xx 10^-3 N m . For the coil in the position for maximum torque, state whether the plane of the coil is parallel to, or normal to , the direction of the magnetic field.