Online Electrical Engineering Test - Electrical Engineering Test 10

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Free electrons make current possible.

True

False

[#]

If 750 µA is flowing through 11 k

of resistance, what is the voltage drop across the resistor?

8.25 V

82.5 V

14.6 V

146 V

[#]

At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

1.286 kWh

12.85 kWh

535 kWh

252 kWh

[#]

A half-watt is equal to how many milliwatts?

5,000 mW

5 mW

500 mW

50 mW

[#]

Series aiding is a term sometimes used to describe voltage sources of the same polarity in series.

True

False

[#]

If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is

50 mA

70 mA

120 mA

40 mA

[#]

In a parallel circuit, the branch with the lowest resistance has the most current.

True

False

[#]

What is the Thevenin equivalent (V_TH and R_TH) for the circuit given?

6.4 V, 422

6.4 V, 560

6.4 V, 680

30 V, 422

[#]

Find branch current IR₂.

5.4 mA

–5.4 mA

113.0 mA

119.6 mA

[#]

10.

What is the current through R₂?

3.19 A

319 mA

1.73 A

173 mA

[#]

11.

Third-order determinants are evaluated by the expansion method or by the cofactor method.

True

False

[#]

12.

A 2

F, a 4

F, and a 10

F capacitor are connected in series. The total capacitance is less than

1.5

[#]

13.

Five time constants are required for a capacitor to charge fully or discharge fully.

True

False

[#]

14.

In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.

True

False

[#]

15.

A certain series RLC circuit with a 200 Hz, 15 V ac source has the following values: R = 12

, C = 80

F, and L = 10 mH. The total impedance, expressed in polar form, is

12.28

12.34°

12.57

12.34°

9.95

12.34°

12.62

12.34°

[#]

16.

A 10

resistor, a 90 mH coil, and a 0.015

F capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below f_r is

1,616

161

3,387

1,771

[#]

17.

Referring to Problem 18, what is the bandwidth of the filter?

1 kHz

632 kHz

50.3 kHz

10.5 kHz

[#]

18.

If the RC time constant of an integrator is increased, as the time constant is increased

the capacitor charges more during a pulse and discharges less between pulses

the capacitor charges less during a pulse and discharges more between pulses

the capacitor charges more during a pulse and discharges more between pulses

the capacitor charges less during a pulse and discharges less between pulses

[#]

19.

In an RC differentiator, the sum of the capacitor voltage and the resistor voltage at any instant

must be zero

must be equal to the applied voltage

is less than the applied voltage but greater than zero

cannot be determined

[#]

20.

In an RL integrating circuit, the output voltage is taken across the inductor.

True

False

[#]

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Online Electrical Engineering Test - Electrical Engineering Test 10

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