The storage battery of a car has an emf of \(12 V\). If the internal resistance of the battery is \(0.4 \Omega\), what is the maximum current that can be drawn from the battery?
Speed
00:00
01:36
The storage battery of a car has an emf of \(12 V\). If the internal resistance of the battery is \(0.4 \Omega\), what is the maximum current that can be drawn from the battery?
Answer
\(30\ A\)
To Keep Reading This Answer, Download the App
4.6
Review from Google Play
To Keep Reading This Answer, Download the App
4.6
Review from Google Play
Solution
Given: emf,\(E=12\;V\)
Internal resistance \(r=0.4 \ \Omega\)
Output voltage,
\(V=E-Ir\)
\(r=0.4\; \Omega\)
and for maximum output voltage external resistance, \(R\) will be \(0\).
As per Ohm’s Law,
\(V=\mathit{IR}\)
On substituting the given values, we have
\(E=I(R+r)\)
\(I=\frac E{R+r}\)
\(I=\frac{12}{0+0.4}\)
\(I=30A\)
Hence, the maximum current that can be drawn from the battery is\(30\;A\).
Internal resistance \(r=0.4 \ \Omega\)
Output voltage,
\(V=E-Ir\)
\(r=0.4\; \Omega\)
and for maximum output voltage external resistance, \(R\) will be \(0\).
As per Ohm’s Law,
\(V=\mathit{IR}\)
On substituting the given values, we have
\(E=I(R+r)\)
\(I=\frac E{R+r}\)
\(I=\frac{12}{0+0.4}\)
\(I=30A\)
Hence, the maximum current that can be drawn from the battery is\(30\;A\).
To Keep Reading This Solution, Download the APP
4.6
Review from Google Play
To Keep Reading This Solution, Download the APP
4.6
Review from Google Play
Correct8
Incorrect0
Still Have Question?
Watch More Related Solutions
Determine the current in each branch of the network shown in figure
In a metre bridge \([\)figure shown below\(],\) the balance point is found to be at \(39.5\) cm from the end \(A\) , when the resistor \(Y\) is of \(12.5\;\Omega \) . Determine the resistance of \(X\) . Why are theconnections between resistors in a Wheatstone or meter bridge made of thick copper strips?
Load More
More Solution Recommended For You