Schaum's Outline of Basic Electricity 1st. Edition by Milton Gussow | 9780070252400 | 0070252408 | Holooly

Basic Electrical

Schaum's Outline of Basic Electricity

510 SOLVED PROBLEMS

Question: 19.SP.9

A RC series circuit with a square-wave input is shown (Fig. 19-15). The input is a periodic train of pulses with an amplitude of 10 V and a width of 1 ms, with each pulse generated every 2 ms. Plot the output voltage curve across the resistor. ...

Verified Answer:

T=R C=\left(1 \times 10^3\right)\left(0.1 \...

Question: 19.SP.8

A RC series circuit with a rectangular pulse input is shown (Fig. 19-13). A rectangular pulse is a special case of a constant dc source because the voltage is a constant V when the pulse is on and a constant zero when the pulse is off. If a single pulse is applied to the circuit, find the voltage ...

Verified Answer:

Find the time constant of the circuit.

T=R ...

Question: 19.SP.7

A simple switching circuit for producing a sawtooth wave is shown (Fig. 19-12a). The switch S is closed and then opened very quickly so that the capacitor is not fully charged but only charged to the linear portion of its charging exponential curve (Fig. 19-12b). (The linear portion is the ...

Verified Answer:

Write the voltage formula for charging the capacit...

Question: 19.SP.6

For the circuit shown (Fig. 19-11), a 40-μF capacitor is added across the 20-μF capacitor in the circuit of Fig. 19-10. Find the time constant of this circuit and the voltage across this circuit 3 s after the start of charge. ...

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Find the total capacitance for two capacitors in p...

Question: 19.SP.5

For a RC series circuit (Fig. 19-10), find (a) the time constant of the circuit; (b) vC and vR one time constant after the switch is closed and at 5 s, and (c) vC and vR one time constant after discharge starts, assuming the capacitor is fully charged to 10 V. ...

Verified Answer:

(a) Write Eq. (19-23) for the time constant in a R...

Question: 19.SP.4

A RL circuit (Fig. 19-9) is used to generate a high voltage to light a neon bulb, which requires 90 V for ionization at which time it glows. When the circuit is open, the high resistance R2 produces a low time constant L/R so that the current drops toward zero much faster than the rise of current ...

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(a) The time constant is the ratio of total induct...

Question: 19.SP.3

In the circuit shown (Fig. 19-8), find (a) the total inductance and (b) the time constant. Assume that a current of 10 A is flowing when the switch S is opened. Find (c) the current 2 s later. ...

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(a) Reduce the series-parallel combination .of ind...

Question: 19.SP.2

A RL series circuit has the following values: V = 75 V dc, R = 50 Ω, and L = 15 H. (a) Find the time constant. (b) How long after the circuit is energized will the current reach a steady value? (c) What is the steady-state value of current? ...

Verified Answer:

(a) Write the formula for the time constant, Eq. (...

Question: 19.SP.1

A series circuit contains a resistance of 20 Ω and an inductance of 10 H connected across a voltage source of 110 V. (a) What is the current 1 s after the circuit is closed? (b) What are vR and vC at this time? Some time after the current reaches a steady value, the switch is opened. When the ...

Verified Answer:

(a) Step 1. Write the formula for charging or risi...

Question: 19.12

If a RC circuit has a time constant of 1 s, how long will it take for vR to drop from 100 to 50 V? ...

Verified Answer:

Write the time equation for voltage decay, Eq. (19...

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