For a movie stunt, an empty truck with a mass of 2000 kg goes 10 m/s and runs into a stopped car of mass 1000 kg. The truck then
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Answer:
D) 9.4 V, 0.38 A
1) Voltage in the secondary coil: 9.4 V
The transformer equation states that:
where
Vp = 120 V is the voltage in the primary coil
Np = 1400 is the number of turns in the primary coil
Vs = ? is the voltage in the secondary coil
Ns = 110 is the number of turns in the secondary coil
Solving the formula for Vs, we find
2) Current in the secondary coil: 0.38 A
A transformer is considered to be 100% efficient: it means that there is no loss of power, so the power in input is equal to the power in output
where
Vp = 120 V is the voltage in the primary coil
is the current in the primary coil
Vs = 9.4 V is the voltage in the secondary coil
is the current in the secondary coil
Solving the equation for ,