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A real battery is not just an emf. We can model a real 1.5v battery as a 1.5v emf in series with a resistor known as the "internal resistance", as shown in the figure(Figure 1) . A typical battery has 1.0 ohms internal resistance due to imperfections that limit current through the battery. When there's no current through the battery, and thus no voltage drop across the internal resistance, the potential difference between its terminals is 1.5v , the value of the emf. Suppose the terminals of this battery are connected to a 2.7 ohm resistor.
What is the potential difference between the terminals of the battery?
What fraction of the battery's power is dissipated by the internal resistance?
Silver has a resistivity of 1.62×10^?8 ?m, and a density of 1.05×10^4 kg/m3. What is L? 2.At 20.0 °C, a mainly silicon resistor has a resistance of 585 ?, At what temperature will their resistances be equal
4 kg of liquid seawater with initial temp 0 C and salinty 3 % is mixed with pure water with initital temp 15 C the system reaches equilibrium at 5 C
To stop a car, first you require a certain reaction time to begin braking; then the car slows under the constant braking deceleration. What is your reaction time
An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.230 T, find the speed of the electron and the radius of the circular path
A coin slides over a frictionless plane and across an xy coordinate system from the origin to a point with xy coordinates, How much work is done by the force on the coin during the displacement
Calculate the shortest wavelength that will be emitted from an X-ray tube in which the electron beam has been accelerated through a potential difference of 30 kV
What is the magnitude of the auto average acceleration.
Two charges q1 = 7 µC, q2 = -33 µC, are L = 14 cm apart. A third charge is to be placed on the line between the two charges. How far from q1 should the third charge be placed so that the net electric force on the third charge is minimized?
We can approximate an electron moving in a nanowire as a one-dimensional infinite square-well potential. Let the wire be 2 μm long. The nanowire is cooled to a temperature of 13K, What are the three lowest energy levels of the electrons
An ideal spring with a stiffness of 379N/m is attached to a wall, and its other end is attached to a block that has a mass of 16-kg. The spring/block system is then stretched away from the spring's relaxed position until 59J of mechanical potentia..
A battery of internal resistance r = 0.2 ohms and emf = 12.0 V is connected to a device with resistance R = 6.0 ohms. What is the rate of heat generated in the battery
A car whose initial speed is 40 m/s undergoes a constant acceleration of -5 m/s2 for 6 s when its brakes are applied. How far does the car travel
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