What color is the moon
2 answers:
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Answer:
Capacitive reactance of the capacitor is 68 ohms
Explanation:
It is given that,
Capacitance,
Frequency,
Capacitive reactance is given by :
or
So, the capacitive reactance of the capacitor is 68 ohms. Hence, this is the required solution.
Answer:
.
Explanation:
The efficiency of a machine is the percentage of energy input that was turned into useful energy.
The power rating of this lamp is (same as
,) meaning that
of energy is supplied to this lamp every second.
The question states that out of that
of energy input would be turned into heat, which is not useful energy output in this scenario. Assuming that all other forms of energy loss is negligible. The rest of the
of energy supplied to this lamp would be turned into useful energy output.
Thus, every second, this lamp would receive of energy input and would outputs
of useful work. The efficiency of this lamp would be:
.