PHY203
Question: Describe the voltage across the capacitor at an instant of time during the oscillations of an LC circuit when the current is momentarily zero.
Answer: It has its maximum value.
Question: The frequency of an LC oscillator is
Answer: Inversely proportio
Question: A battery of emf of 12.0 V is used to charge 9.00 pF capacitor. After the capacitor is charged fully, it is disconnected from the power supply and connected across 2.81 mH inductor. If the resistance in the circuit is negligible, find the frequency and period of oscillation of the circuit.
Answer: 1.00 × 106 Hz; 1.00 × 10-6 s
Question: A potential difference of 10.0 V is connected across a 1.0 µF in an LC circuit. Calculate the inductance of the inductor that should be connected to the capacitor for the circuit to oscillate at 1125 Hz.
Answer: 0.02 H
Question: Simple pendulum of length 2.0 m oscillates on the surface of a hypothetical planet P. if the period of oscillation is 2.50 seconds, compute the surface gravity on the planet.
Answer: 12.6 ms-2
Question: A torque of 0.6 N-m/rad is applied to a wire that suspends a solid sphere. If the torque should twist the wire such that its period of oscillation is 0.47 seconds, calculate the moment of inertia of the solid sphere.
Answer: 3.36 × 10-3 kg m-2
Question: At an instant of time during the oscillations of an LC circuit, the current is at its maximum value. At this instant, what happens to the voltage across the capacitor?
Answer: It is zero.
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