Answer:
B. It increases the potential energy of electrical charges to produce a current.
Explanation:
Battery is a source of constant potential difference
When a charge is passed through the battery then its potential energy changes by
here we know that
= potential difference of battery
so as the charge is passing through the terminals of battery its potential energy is changed by above value.
Now by the conservation of energy principle we know that this change in potential energy will convert into kinetic energy of charge and then the flow of charge will produce current in the circuit.
So battery is used to maintain a constant current in the circuit by giving potential energy to the charge.
Let the Blaise runs for time "t" to complete the race
so the total distance he moved is given by
Now Issac runs for time t = "t - 2*60"
because it took rest for 2 minutes
now it is given that Blaise wins by 10 m distance
now the distance moved by Blaise is given by
Complete Question
How many turns are in its secondary coil, if its input voltage is 120 V and the primary coil has 210 turns.
The output from the secondary coil is 12 V
Answer:
The value is
Explanation:
From the equation we are told that
The input voltage is
The number of turns of the primary coil is
The output from the secondary is
From the transformer equation
Here is the number of turns in the secondary coil
=>
=>
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