# ali-1

Most popular questions and responses by ali-1
1. ## physics

A new "D" battery has an emf of 1.5 V. When a wire of negligible resistance is connected between the terminals of the battery, a current of 25 A is produced. Find the internal resistance of the battery. ________ Ω

asked on January 26, 2011
2. ## physics

The electric potential energy stored in the capacitor of a defibrillator is 83 J, and the capacitance is 124 µF. What is the potential difference that exists across the capacitor plates? _____________ V

asked on January 25, 2011
3. ## physics

Suppose that the resistance between the walls of a biological cell is 3.00 x 10^9 Ω. (a) What is the current when the potential difference between the walls is 70 mV? ____________ A (b) If the current is composed of Na+ ions (q = +e), how many such ions

asked on January 25, 2011
4. ## physics

A capacitor stores 5.25 x 10^-5 C of charge when connected to a 1.5-V battery. How much charge does the capacitor store when connected to a 7.5-V battery? _______________ C

asked on January 25, 2011
5. ## physics

Multiple-Concept Example 9 discusses the physics principles used in this problem. Three resistors, 2.2, 3.9, and 6.4 Ω, are connected in series across a 24-V battery. Find the power delivered to each resistor. resistance (Ω) power (W) 2.2 ______ 3.9

asked on January 26, 2011
6. ## physics

A 59.0-Ω resistor is connected in parallel with a 116.0-Ω resistor. This parallel group is connected in series with a 15.0-Ω resistor. The total combination is connected across a 15.0-V battery. (a) Find the current in the 116.0-Ω resistor. _______ A

asked on January 26, 2011