Understanding dB in Electrical Engineering

Understanding dB in Electrical Engineering

12th Grade

15 Qs

quiz-placeholder

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Understanding dB in Electrical Engineering

Understanding dB in Electrical Engineering

Assessment

Quiz

Engineering

12th Grade

Hard

Created by

A Al-Amri

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does dB stand for in electrical engineering?

decibel

decibel meter

data bandwidth

digital byte

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the decibel scale used to express power levels?

The decibel scale measures power levels in linear terms for simplicity.

The decibel scale is used to express temperature levels in electronics.

The decibel scale is a unit of distance measurement in acoustics.

The decibel scale expresses power levels logarithmically, allowing for easier comparison of large power ranges.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula to convert power in watts to dB?

dB = 10 * log10(P / P0)

dB = log10(P * P0)

dB = 10 * P / P0

dB = 20 * log10(P / P0)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a signal is increased by 3 dB, how does the power change?

Power doubles.

Power increases by 6 dB.

Power decreases by half.

Power remains the same.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the reference power level typically used in dB calculations?

1 milliwatt (mW)

100 milliwatts (mW)

1 watt (W)

10 microwatts (µW)

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you convert voltage ratios to dB?

dB = 20 * log10(V2/V1)

dB = 10 * log10(V1/V2)

dB = 20 * log(V2/V1)

dB = 10 * log10(V2/V1)

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the dB value for a 10 V?

20 dB

30 dB

5 dB

10 dB

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