Disd112984
07.09.2019 •
Physics
Atransformer consists of 290 primary windings and 824 secondary windings. part a: if the potential difference across the primary coil is 21.5 v , what is the voltage across the secondary coil?
part b: if the potential difference across the primary coil is 21.5 v , what is the current in the secondary coil if it is connected across a 115 ω resistor?
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Ответ:
Part 1) Voltage in secondary windings is 61.08 Volts
Part 2) Current in secondary windings is 0.53 Amperes
Explanation:
The potential developed in the primary and secondary winding of a transformer are related as
where
Np no of turns in primary coil
Ns no of turns in secondary coil
Vp Voltage of turns in primary coil
Vs Voltage of turns in secondary coil
Applying values in the formula we get
Part 2)
Using Ohm's law the current is given by
Ответ:
5.62 x 10^-7 sec-1
Explanation:
Converting days to seconds:
14.26 x 24x60x60= 1.27 x 10^6
Half life= 0.693 / Decay constant
so
Decay constant = 0.693/1.27x 10^6
= 5.62 x 10^-7