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Discharging RC circuit. • In the RC circuit shown, the battery has fully charged the capacitor, so Q0 = C E. Then at t = 0 the switch is thrown from position a to b. The battery emf is 20.0 V, and the capacitance C = 1.02 μF. The current I is observed to decrease to 0.50 of its initial value in 40 μs. (a) What is the value of Q, the charge on the capacitor, at t = 0? (b) What is the value of R? (c) What is Q at t = 60 μs?
RC Circuit, with EMF. • The capacitance in the circuit shown is C = 0.30 μF, the total resistance is R = 20 kΩ, the battery emf is E = 12 V. Calculate: (a) the time constant, (b) the maximum charge the capacitor could acquire, (c) the time it takes for the charge to reach 99% of this value, (d) the current I when the charge Q is half its maximum value, (e) the maximum current, (f) the charge Q when the current I is 0.20 of its maximum value.
What is meant by transfer function of a system
the terminal p.d of a battery is 12volts when an external circuit of 20 ohms was connected and 13.5volts when an external resistanceof 45 ohms was connected. calculate the e.m.f and the internal resistance of the battery
Explain resistivity
A framed painting weighs 30kg. The two wires supporting it makes an angle of 120° with
each other. What are the tensions in the wire?
What capacitance when connected in series with a 500Ω resistor will limit the current
drawn from a 48-mV 465-kHz source to 20μA?
