Online Electronics Test - Electronics Test 1

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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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1300 × 10^–12 F is the same as 1300 ___.

[#]

If a 220

, a 100

, and a 180

resistor are connected in series across a 12 V source, the circuit current equals ___.

41.67 A

120 mA

500 A

24 mA

[#]

The total power dissipated is 4.8 watts.

True

False

[#]

The rms voltage value is a measure of a sine wave's heating effect.

True

False

[#]

A capacitor has 25 V across its plates and a stored charge of 1500

C. What is the capacitance value?

60 pF

16.67 mF

37.5 mF

[#]

The phase angle in the circuit in the given circuit is approximately equal to ______.

53°

90°

37°

0°

[#]

What is the voltage across the capacitor in the given circuit?

6.8 V

11.9 V

16.1 V

22.9 V

[#]

What is the resonant frequency in the given circuit?

11.6 Hz

275.8 Hz

1.5 kHz

3.2 kHz

[#]

By increasing the resistance of a coil you can increase the Q of the coil at resonance.

True

False

[#]

10.

The output voltage is _____ at the resonant frequency in the given circuit.

0 mV

31.4 mV

66.5 mV

380 mV

[#]

11.

The depletion-mode MOSFET

can operate with only positive gate voltages

can operate with only negative gate voltages

cannot operate in the ohmic region

can operate with positive as well as negative gate voltages

[#]

12.

A circuit whose output is proportional to the difference between the input signals is considered to be which type of amplifier?

common-mode

darlington

differential

operational

[#]

13.

Changing the input voltage to an op-amp circuit will change its voltage gain.

True

False

[#]

14.

A two-pole high-pass active filter would have a roll-off rate of

40 dB/decade

–40 dB/decade

20 dB/decade

–20 dB/decade

[#]

15.

The power rating of a resistor is __________ related to __________.

directly, the type of cooling used

indirectly, the type of material used

directly, its surface area

indirectly, the color coding

[#]

16.

How will electrons flow through a p-channel JFET?

from source to drain

from source to gate

from drain to gate

from drain to source

[#]

17.

Which type of signal is represented by discrete values?

noisy signal

nonlinear

analog

digital

[#]

18.

Once a PAL has been programmed:

it cannot be reprogrammed.

its outputs are only active HIGHs

its outputs are only active LOWs

its logic capacity is lost

[#]

19.

What happens to the parallel output word in an asynchronous binary down counter whenever a clock pulse occurs?

The output word decreases by 1.

The output word decreases by 2.

The output word increases by 1.

The output word increases by 2.

[#]

20.

The data stored in a Mask ROM (MROM) is ___________.

permanent

volatile

erasable

temporary

[#]

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Online Electronics Test - Electronics Test 1

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