Electric Circuits Answers

A sample of Si has electron and hole mobilities of 0.13 and 0.05 m /V-s 2 respectively at
300 K. It is doped with P and Al with doping densities of 21 3 1.510 / m and
21 3 2.510 / m respectively. The conductivity of the doped Si sample at 300 K is

An LED operates at 1.5 V and 5 mA in forward bias. Assuming an 80% external
efficiency of the LED, how many photons are emitted per second?

A signal of frequency 10k Hz is being digitalized by an A/D converter. A possible
sampling time which can be used is

A series circuit with a resistor of 100 Ω
capacitor of 25 μF and inductance of
0.15 H is connected across 220-V, 60-Hz
supply. Calculate (i) current (ii) power
and (iii) power factor in the circuit.

Calculate the amount of charge represented by six million protonsCalculate the amount of charge represented by six million protons

How much charge is represented by 4,600 electrons?

explain cohesive and adhesive force.

write down relation between young modulus,bulk modulus and modulus of rigidity.

a capacitor of 9F is connected to a 27VV battery.what is charge on capacitor.

two resistance 5 and 5 ohm are connected in series to a 20V battery then find current in this circuit.