A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 20.9 V. The electric power being dissipated by the internal resistance of the battery is 37 W. Find the emf of the battery. emf = iThe coil of wire in a galvanometer has a resistance of Rc = 51.10. The galvanometer exhibits a full-scale deflection when the current through it is 0.258 mA. A resistor is connected in series with this combination so as to produce a voltmeter. The voltmeter is to have a full-scale deflection when it measures a potential difference of 15.4 V. What is the resistance of this resistor? Number i UnitsA 9.60-HF and a 2.40-HF capacitor are connected in series across a 24.0-V battery. What voltage is required to charge a parallel combination of the two capacitors to the same total energy? Number i UnitsIn a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.7 x 102. One pulse is delivered every time the fully charged capacitor loses 65.5% of its original charge. What is the capacitance of the capacitor? Number i UnitsFour identical capacitors are connected with a resistor in two different ways. When they are connected as in part a of the drawing, the time constant to charge up this circuit is 0.57 s. What is the time constant when they are connected with the same resistor as in part b? R R (a) (b) Number i Units