Fundamentals of Physics Study Set 2

Physics & Astronomy

Quiz 31 :

Electromagnetic Oscillations and Alternating Current

Quiz 31 :

Electromagnetic Oscillations and Alternating Current

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A charged capacitor and an inductor are connected in series.At time t = 0 the current is zero, but the capacitor is charged.If T is the period of the resulting oscillations, the next time, after t = 0 that the charge on the capacitor is a maximum is:
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B

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An LC series circuit with an inductance L and a capacitance C has an oscillation frequency f.If we now take two of those inductors, each with inductance L, and two of the capacitors, each with capacitance C, and wire them all in series to make a new circuit, its oscillation frequency will be:
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C

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A capacitor in an LC oscillator has a maximum potential difference of 15 V and a maximum energy of 360 J.At a certain instant the energy in the capacitor is 40 J.At that instant what is the potential difference across the capacitor?
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An LC circuit has an inductance of 15 mH and a capacitance of 10 F.At one instant the charge on the capacitor is 25 C.At that instant the current is changing at the rate:
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The electrical analog of a spring constant k is:
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A charged capacitor and an inductor are connected in series.At time t = 0 the current is zero, but the capacitor is charged.If T is the period of the resulting oscillations, the next time, after t = 0 that the energy stored in the magnetic field of the inductor is a maximum is:
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We desire to make an LC circuit that oscillates at 100 Hz using an inductance of 2.5 H.We also need a capacitance of:
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Which of the following has the greatest effect in decreasing the oscillation frequency of an LC circuit? Using instead:
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In an oscillating LC circuit, the total stored energy is U and the maximum charge on the capacitor is Q.When the charge on the capacitor is Q/2, the energy stored in the inductor is:
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A capacitor in an LC oscillator has a maximum potential difference of 15 V and a maximum energy of 360 J.At a certain instant the energy in the capacitor is 40 J.At that instant what is the emf induced in the inductor?
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In the circuit shown, switch S is first pushed up to charge the capacitor.When S is then pushed down, the current in the circuit will oscillate at a frequency of: img
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A charged capacitor and an inductor are connected in series.At time t = 0 the current is zero, but the capacitor is charged.If T is the period of the resulting oscillations, the next time, after t = 0 that the energy stored in the electric field of the capacitor is a maximum is:
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A charged capacitor and an inductor are connected in series.At time t = 0 the current is zero, but the capacitor is charged.If T is the period of the resulting oscillations, the next time, after t = 0 that the voltage across the inductor is a maximum is:
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An LC circuit has an oscillation frequency of 105 Hz.If C = 0.1 F, then L must be about:
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An LC circuit consists of a 1 F capacitor and a 4 mH inductor.Its oscillation frequency is approximately:
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Consider the mechanical system consisting of two springs and a block, as shown.Which one of the five electrical circuits (I, II, III, IV, V)is the analog of the mechanical system? img
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A 150-g block on the end of a spring with a spring constant of 35 N/m is pulled aside 25 cm and released from rest.In the electrical analog the maximum charge on the capacitor is 0.25 C.The maximum current in the LC circuit is:
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An LC circuit has an inductance of 20 mH and a capacitance of 5.0 F.If the charge amplitude is 40 C, what is the current amplitude?
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A charged capacitor and an inductor are connected in series.At time t = 0 the current is zero, but the capacitor is charged.If T is the period of the resulting oscillations, the next time, after t = 0 that the current is a maximum is:
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A 150-g block on the end of a spring with a spring constant of 35 N/m is pulled aside 25 cm and released from rest.In the electrical analog the initial charge on the capacitor is:
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