Use the ideal diode equation to calculate the voltage required to produce a current density of 25 A/cm2 for a junction of cross-sectional area 10-4 cm2, a reverse saturation current of 2x10-15 A and at 300 K

Explanation:

First we need to find the value of diode current:

Now, we use ideal diode equation:

where,

Is = saturation current = 2 x 10⁺¹⁵ A

q = charge on electron = 1.6 x 10⁻¹⁹ C

V_D = Diode Voltage = ?

n = ideality factor = 1 (for ideal diodes)

k = Boltzman constant = 1.38 x 10⁻²³ J/k

T = Temperature = 300 k

Therefore,

taking natural log on both sides:

it takes about 30 days for it to break down

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2