live, neutral and earth
neutral, earth and live
earth, live and neutral
earth, neutral and live
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is not an advantage of an alkaline accumulator?
The electrolyte does not need attention
It can be recharged
It has low internal resistance
It has a much longer life than lead-acid accumulator
Correct answer is A
No explanation has been provided for this answer.
A resistor with fixed resistance value is called a
resistance box
standard resistor
shunt resistor
multiplier resistor
Correct answer is B
No explanation has been provided for this answer.
The diagram above illustrates a waveform. Determine the number of wavelengths in it
4
3\(\frac{1}{2}\)
2\(\frac{1}{2}\)
2
Correct answer is C
No explanation has been provided for this answer.
250\(ms^{-1}\)
625\(ms^{-1}\)
1200\(ms^{-1}\)
1500\(ms^{-1}\)
Correct answer is C
The fundamental frequency \((f_{0})\) = \(\frac{v}{2l}\)
\(f_{0} = 150Hz; l =400cm = 4m\)
\(150 = \frac{v}{2\times 4}\)
\(v = 150 \times 8 = 1200ms^{-1}\)
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