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Capacitance GapFill

Target Level
C
Running Total
0
0%
Attempt
1 of 3

You must fill all the gaps before clicking ‘Check Answers!’

A capacitor is an electrical component which stores charge. Capacitance is defined as  the potential difference per unit charge stored inthe work done in moving charges acrossthe maximum charge stored bythe charge stored per unit potential difference across a capacitor. The units of capacitance are  teslascoulombsdipolesfarads.
Capacitors are made up of a dielectric between two parallel conducting plates. Dielectrics are  electrical conductors which can be polarisedelectrical insulators which can be polariseda material which is already polarisedany material which resists polarisation. Dielectrics enable the plates to store more charge because  polar molecules rotatecharged molecules rotatecharged molecules are free to moveall molecules remain stationary when an electrical field is applied. For a parallel plate capacitor, the capacitance is given by  C = A/dC = A²/dC = AdC = A²d × ε0εr.
The energy stored by a capacitor is given by E = ½ × QV, which can also be written as  E = ½ × C/V² or E = ½ × Q²CE = ½ × CV² or E = ½ × Q²/CE = ½ × CV² or E = ½ × Q/C²E = ½ × C/V² or E = ½ × Q²/C.
When a capacitor is put in series with a resistor, the charge stored by the capacitor decreases exponentially. The time taken for the charge to decrease by half of its original value is known as the half-life, which is equal to  0.37 R/C0.37 C/R0.37 RC0.69 RC.

This is your 1st attempt! You get 3 marks for each one you get right. Good luck!

Pass Mark
72%