# Online Electrical Engineering Test - Electrical Engineering Test 6 Loading Test...

Instruction:

• This is a FREE online test. DO NOT pay money to anyone to attend this test.
• Total number of questions : 20.
• Time alloted : 30 minutes.
• Each question carry 1 mark, no negative marks.
• DO NOT refresh the page.
• All the best :-).

1.

A two-terminal variable resistor is known as a

A.
 potentiometer B.
 thermistor C.
 rheostat D.
 wiper 2.

If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is

A.
 220 k  B.
 22 k  C.
 2.2 k  D.
 220  3.

How many watt-hours represent 65 W used for 18 h?

A.
 11.7 Wh B.
 1,170 Wh C.
 11,700 Wh D.
 117,000 Wh 4.

If a 6 V and a 9 V source are connected series aiding, the total voltage is

A.
 6 V B.
 9 V C.
 3 V D.
 15 V 5.

The total resistance of a circuit is 680 . The percentage of the total voltage appearing across a 47 resistor that makes up part of the total series resistance is

A.
 68% B.
 47% C.
 69% D.
 6.91% 6.

The output of a certain voltage divider is 12 V with no load. When a load is connected, the output voltage

A.
 decreases B.
 increases C.
 remains the same D.
 becomes zero 7.

The higher the range setting, the less the internal resistance and the greater the load effect of the voltmeter on a circuit.

A.
 True B.
 False 8.

Find the current through R2 of the given circuit. A.
 30.7 mA B.
 104 mA C.
 74 mA D.
 134 mA 9.

Sine wave A has a positive-going zero crossing at 45°. Sine wave B has a positive-going zero crossing at 60°. Which of the following statements is true?

A.
 Wave A leads wave B by 15°. B.
 Wave A lags wave B by 15°. C.
 Wave A leads wave B by 105°. D.
 Wave A lags wave B by 105°. 10.

An 18 V power supply is connected across a coil with a winding resistance of 180 . Current flow in the coil is

A.
 1 mA B.
 10 mA C.
 100 mA D.
 1 A 11.

The permeability of a core material is an indication of the ability of the material to establish a magnetic field.

A.
 True B.
 False 12.

An induced voltage is produced as a result of a dc voltage.

A.
 True B.
 False 13.

What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?

A.
 4 kVA B.
 0.25 kVA C.
 16 kVA D.
 8 kVA 14.

The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 . The voltage across the load is

A.
 0 V B.
 6 V C.
 18 V D.
 2 V 15.

Total current in an RC circuit always leads the source voltage.

A.
 True B.
 False 16.

A 1.2 k resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is

A.
 152.6  B.
 1,526  C.
 1,200  D.
 942  17.

In a series RLC circuit, the larger reactance determines the net reactance of the circuit.

A.
 True B.
 False 18.

The reactive voltages, VL and VC, cancel at resonance.

A.
 True B.
 False 19.

The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is

A.
 0 V B.
 15 V C.
 10.60 V D.
 21.21 V 20.

An RC high-pass filter consists of an 820 resistor. What is the value of C so that Xc is ten times less than R at an input frequency of 12 kHz?

A.
 81 F B.
 161 F C.
 0.161 F D.
 220 F 