Answer: 3978 pF
Explanation:
Capacitance can be defined as ability to store charge. It is the ratio of charge over electric potential.
where, A is the area of the plates and d is the distance between plates forming the capacitor.
diameter of the plates, di = 15 cm =0.15 m
radius of the plate, r = di/2 = 0.075 m
Area of the plates, A = πr² = 0.018 m²
Distance between the plates, d = 0.04 mm = 0.00004 m
Permittivity, ∈₀ = 8.84 × 10⁻¹² F/m
Capacitance,
Actually Welcome to the Concept of the Ohms Law,
According to the Ohms law,
V = I*R, where, V = Voltage, I = Current, R = resistance,
so here given as, V = 240 V, I = 32 A,
so we get as, R = 240/32
R = 7.5 ohms,
===> The resistant R is ==> 7.5 ohms.
A. temperature decreases in the troposphere as you go higher up, because gas density becomes lower, capturing less heat
Answer:
Grid
Explanation:
The number of electrons attaining the fluorescent light is regulated by the grid in a cathode ray tube.When the heater is supplied with current, it allows the electrons to emit from the cathode. Before approaching the anode the electrons pass through grid opening. The number of electrons attempting to reach the anode may also be regulated by managing the number of electrons passing through the grid.
Time = (distance) / (speed)
Time = (150 x 10⁹ m) / (3 x 10⁸ m/s) =
50 x 10¹ sec =
<em>500 sec</em> = 8 min 20 sec