the terminal p.d of a battery is 12 volts when an external resistance of 20ohms is connected and 13.5v when an external resistance of 45 ohms is connected.calculate the e.m.f and the internal resistance of the battery
Answers
Answer:
E=15[V]
E=15[V]r=5]Ohm]
E=15[V]r=5]Ohm]Here's how you might solve it:
E=15[V]r=5]Ohm]Here's how you might solve it:Sketch and label both circuits. Include values where known.
E=15[V]r=5]Ohm]Here's how you might solve it:Sketch and label both circuits. Include values where known.Calculate current for each.
E=15[V]r=5]Ohm]Here's how you might solve it:Sketch and label both circuits. Include values where known.Calculate current for each.I1=0.6[A], I2=0.3[A]
E=15[V]r=5]Ohm]Here's how you might solve it:Sketch and label both circuits. Include values where known.Calculate current for each.I1=0.6[A], I2=0.3[A]Using equation U=E-I*r, write equation for each circuit. You will have 2 equations and two variables.
E=15[V]r=5]Ohm]Here's how you might solve it:Sketch and label both circuits. Include values where known.Calculate current for each.I1=0.6[A], I2=0.3[A]Using equation U=E-I*r, write equation for each circuit. You will have 2 equations and two variables.Solve for E.
E=15[V]r=5]Ohm]Here's how you might solve it:Sketch and label both circuits. Include values where known.Calculate current for each.I1=0.6[A], I2=0.3[A]Using equation U=E-I*r, write equation for each circuit. You will have 2 equations and two variables.Solve for E.Substitute solved value for E back into either equation to solve for r.