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?

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

A battery of emf 10 V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

A battery of e.m.f. 10V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, What is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

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?

When a circuit element X is conneted across a.c. sourceof emf 220sqrt2V , a current sqrt2 A flows through it and this current is in phase with applied voltage. When another element Y is connected across same a.c. source, the same current flows in the circuit, but it leads the voltages by pi//2. Find current that flows in the circuit when series combination of X and Y is connected acorss same a.c. voltage.

A battery of e.m.f. 12 V and internal resistance 5Omega is connected to a resistor. If the current through the circuit is 0.3 A, what is the resistance of the resistor? What is the terminal voltage of the battery, when the circuit is closed?

A potentiometer wire carries current. The potential difference across 70 cm of its balances the potential difference across a 2 ohm coil supllied by a cell of e.m.f. 2 volt. When a 1 ohm coil is placed in parallel with the 2 ohm coil, a length equal to 50 cm of the potentiometer wire is required to balance the potential difference across the parallel combination. What is the internal resistance of the 2 V cell?

When a circuit element X is conneted across a.c. sourceof emf 220sqrt2V , a current sqrt2 A flows through it and this current is in phase with applied voltage. When another element Y is connected across same a.c. source, the same current flows in the circuit, but it leads the voltages by pi//2. Plot a graph showing variation of net impedance of series combination of X and Y as a function of angular frequency of applied voltage.