A 1.35-V mercury cell with a capacity of 1.5 A h is used to power a cardiac pacemaker.
(a) If the power required is 0.1 mW (1 mW = 1 milliwatt = 0.001 W), what is the average current?
(b) How long will the cell last?
A 1.35-V mercury cell with a capacity of 1.5 A h is used to power a...
A 1.2-V mercury cell with a capacity of 2.0 A*h is used to power a cardiac pacemaker. If the power required is 0.2 mW (1 mW = 1 milliwatt = 0.001 W), how long will the cell last in hours? (hint: first calculate the average current)
Table 1 Cell Type Lithium-iodine Zinc-mercury Operating Cell Potential for Commercial Batteries, E (V) +2.80 +1.35 Table 2 Standard Reduction Potential, E" (V) Half-Reaction Zn(OH).1? +2e → Zn +40H Zn(OH), +2e → Zn +20H HgO + H2O +2e - Hg + 2OH 0, + 2 H2O + 4e 40H - 1.20 |--1.25 +0.10 +0.40 Pacemakers are electronic devices that help regulate the heart rate. Currently, lithium-iodine cells are commonly used to power pacemakers and have replaced zinc-mercury cells. Table 1...
a) Given a battery with 1.5 V and 2200 mAh. How long can it power a device that has a demand of 1.1 W? b) Given a sensor node that consumes 600 μA when the radio is not transmitting and 25 mA when the radio is transmitting. It is powered using two batteries in series, each with 3 V and 2200 mAh. i) How long do the batteries last, if the device is transmitting with a duty cycle of 20%?...
1. A battery with a capacity of 2500 mAh (milliamp-hours) is used to power a device that constantly draws 400 mA of current. Assuming that the battery is ideal, how long will the battery last? The same battery as above is now used to power a clock that only draws current when the second hand "ticks". The current draw during this movement is 2mA. A clock ticks every second but note that the second hand doesn't take a second to...
1.) What is the fill factor of a solar cell having maximum power P(max) = 1.5 W? The open circuit voltage and short circuit current of the cell are V(oc) = .6 V and J(sc) = 2.8 A, respectively. 2.) A solar cell with dimensions 12 cm x 12 cm is illuminated at standard test conditions. The cell has the following external parameters: V(oc) = .8 V, I(sc) = 3 A, V(MPP) = .75 V, I(MPP) = 2.5 A. Calculate...
A smoke detector operates on a 9 V battery having charge capacity of 4500 mA h. (a) If the battery needs to be changed approximately every 2 years, how much power does the smoke detector consume on average? (b) Assuming that the battery can be recharged through a charger providing 0.5 A current, how long would it take to fully charge the battery?
Physics 2 A standard D cell battery can supply 25 mA at 1.5 V for about 300 hours, and its internal resistance is about 1 Ω. A lift is powered by a battery such that it is 50% efficient and is being used to lift a 60-kg object that is initially on the ground. When the winch is set to a very slow speed, the load resistance is much greater than the internal resistance of the battery. The greatest speed...
When a certain 1.5-V battery is used to power a 3-W flashlight bulb, it is dead after 71 minutes of use. If the battery costs $0.53, what is the cost of a kilowatt-hour of electric energy obtained in this way? Round to two decimal places, and do not include the dollar sign!
A solar cell provides an emf of 0.50 V. (a) If the cell supplies a constant current of 26.5 mA for 6.0 h, how much electrical energy does it supply? J (b) What is the power - the rate at which it supplies electrical energy? J/s
Please solve it in one hour !!!
(30 pts) Assume that a circular cell has 57 channels and a cell radius of 10 km. The transmit power of the base station in this cell is 32 W. The path loss exponent in this cell is assumed to be 4. The grade of service is established to be a probability of blocking of 5% (assuming blocked calls are cleared). Assume the average call length is two minutes, and each user averages...