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What limits the quantity of charge a capacitor can store?
A charged capacitor of capacitance C can be discharged through a resistor R. At time t after the discharge has started, the charge Q remaining on the capacitor can be given by the expression:
Q = Qoe^(-t/RC)
(i) Use this equation to obtain an expression for the half-life T1/2 of the discharge process.
(ii) Use this equation to define the time constant t of the discharge
(iii) Compare the values of T1/2 and t.
Q = Qoe^(-t/RC)
(i) Use this equation to obtain an expression for the half-life T1/2 of the discharge process.
(ii) Use this equation to define the time constant t of the discharge
(iii) Compare the values of T1/2 and t.
A charged capacitor of capacitance C can be discharged through a resistor R. At time t after the discharge has started, the charge Q remaining on the capacitor can be given by the expression:
Q = Qoe^(-t/RC)
(i) State the significance of Qo
(ii) Use this equation to obtain an expression for the half-life T1/2 of the discharge process.
Q = Qoe^(-t/RC)
(i) State the significance of Qo
(ii) Use this equation to obtain an expression for the half-life T1/2 of the discharge process.
Briefly describe an experiment to measure the capacitance of a parallel plate capacitor.
How would you relate capacitance to relative permittivity?
Physics
An insulating sphere is 8.50cm in diameter and carries a 5.85uC charge uniformly distributed throughout its interior volume. Calculate the charge enclosed by a concentric spherical surface with radius r = 2.16cm
State and explain the physical factors on which the capacitance of a parallel plate capacitor depends on.
A 1500uF capacitor is fully charged using a 100V DC supply. It is disconnected from the power and connected to an uncharged 1000uF capacitor.
(i) Calculate the PD across the terminals of each capacitor
(ii) Calculate the initial and final energies stored in the capacitors hence explain why there is a loss in energy?
(i) Calculate the PD across the terminals of each capacitor
(ii) Calculate the initial and final energies stored in the capacitors hence explain why there is a loss in energy?
Physics
A bowling ball with a mass of 5.4 kg moves in a straight line at 2.4 m/s. While moving in a straight line, how fast must a 0.001143 kg ping-pong ball travel so that the two end up with the same momentum ?
Physics
A copper rod whose length is 10.0 is heated to 50°c. Find its New length take linear expansivity of copper as 0.000017
