Online Electrical Engineering Test - Electrical Engineering Test 8

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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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When converting 0.16 mA to microamperes, the result is

16 µA

160 µA

1,600 µA

0.0016 µA

[#]

The unit of electrical charge is the

volt

ampere

joule

coulomb

[#]

The maximum resistance value for a brown, red, yellow, gold resistor is

126,000

126,600

114,000

132,000

[#]

How much voltage is needed to produce 2.5 A of current through a 200

resistor?

50 V

500 V

80 V

8 V

[#]

The formula for finding resistance when current and voltage are known is R = I/V.

True

False

[#]

Two resistors are in series: a 5.6 k

resistor and a 4.7 k

resistor. The voltage drop across the 5.6 k

resistor is 10 V. The voltage across the 4.7 k

resistor is

8.39 V

10 V

2.32 V

0 V

[#]

A series circuit acts as a voltage divider.

True

False

[#]

Find the node voltage V_A.

518 mV

5.18 V

9.56 V

956 mV

[#]

When the north poles of two bar magnets are brought close together, there will be

no force

a downward force

a force of attraction

a force of repulsion

[#]

10.

Ampere-turn is the unit of magnetomotive force (mmf).

True

False

[#]

11.

A 1 kHz signal has a period of 1 ms.

True

False

[#]

12.

Five inductors are connected in series. The lowest value is 8 μH. If the value of each inductor is twice that of the preceding one, and if the inductors are connected in order of ascending values, the total inductance is

8 H

32 μH

64 μH

248 μH

[#]

13.

If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250

250

6,250

62,500

[#]

14.

In an RC circuit, the impedance is determined by both the resistance and the capacitive reactance combined.

True

False

[#]

15.

The impedance at the resonant frequency of a series RLC circuit with L = 20 mH, C = 0.02

F, and R_W = 90

20 k

40 k

[#]

16.

A resistor of 3 k

, a 0.05

F capacitor, and a 120 mH coil are in series across a 5 kHz, 20 V ac source. What is the impedance, expressed in polar form?

636

3,769

433

4,337

[#]

17.

Referring to Problem 8, assume the input voltage is 15 V dc. What is the output voltage?

0 V

15 V

7.07 V

10.6 V

[#]

18.

Referring to Problem 15, if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?

6 V

597 mV

5.97 V

0 V

[#]

19.

In an RL low-pass filter, the output voltage is taken across the inductor and the output lags the input.

True

False

[#]

20.

Norton's theorem gives

an equivalent current source in parallel with an equivalent impedance

an equivalent current source in series with an equivalent impedance

an equivalent voltage source in parallel with an equivalent impedance

an equivalent voltage source in series with an equivalent impedance

[#]

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Online Electrical Engineering Test - Electrical Engineering Test 8

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