Correct answer: Galvanic cells have positive voltage potentials, while electrolytic voltage potentials are negative. Both types of cell, however, have oxidation occur at the cathode and reduction occur at the anode. Which is not true about galvanic cell? Question: Which … Continue reading →

The emf of a cell is the sum of the electric potential differences (PDs) produced by a separation of charges (electrons or ions) that can occur at each phase boundary (or interface) in the cell. The magnitude of each PD … Continue reading →

Nanotechnology is science and engineering at the scale of atoms and molecules. It is the manipulation and use of materials and devices so tiny that nothing can be built any smaller. What is a simple definition of nanotechnology? : the … Continue reading →

The electromotive force (emf) is the sum of the electric potential differences produced by a separation of charges (electrons or ions) that can occur at each phase boundary (or interface) in the cell. What is EMF of a cell class … Continue reading →

Nanotechnology offers the potential for new and faster kinds of computers, more efficient power sources and life-saving medical treatments. Potential disadvantages include economic disruption and possible threats to security, privacy, health and the environment. What are the negative effects of … Continue reading →

Samsung’s Galaxy M31 packs a gigantic 6,000mAh battery, which is 900mAh bigger than the Lenovo P2’s. And we won’t keep you in suspense: this larger battery meant the Galaxy lasted for 30hrs 20mins in our video-rundown test, beating the P2 … Continue reading →

One of the benefits of DEWALT XRP™ Lithium Ion batteries is that they have limited self discharge. Storing DEWALT Lithium Ion batteries outside of the charger will not result in loss of charge. Learn more about brushless tools technology. Are … Continue reading →

Lithium-ion batteries are incredibly popular these days. You can find them not just on smartphones but on laptops, PDAs, cars, and iPods. Most smartphone brands including Samsung, iPhone, Infinix, Nokia use lithium-ion batteries. Do all phones have lithium batteries? Lithium-ion … Continue reading →

A positive number on the ammeter means that more electricity is being received by the battery than is being used, suggesting the regulator is not working efficiently (or at all if it’s a large positive number). What is positive and … Continue reading →

How long does it take to charge 280mAh? A small battery needs only a small charging current. For your example a charging current of about 140 – 280mA, giving a charging time of 1–2 hours from the fully discharged state, … Continue reading →

Four Wheel Drive. To start with, 4WD in the automobile industry is an abbreviation for Four Wheel Drive. Also, it is often called 4X4. 4WD is a two-axled vehicle drivetrain, which is responsible for providing torque simultaneously to all of … Continue reading →

A rep at Nikon’s booth just waked us through one of the D4’s most intriguing features. Once the D4 is hooked up to a network via Wi-Fi or its ethernet port, you can pull a network IP address off the … Continue reading →

Electrical component wires. switches. resistors. capacitors. light bulbs. inductors. diodes. transistors. What are the main components of electrical? Electrical systems, also named circuits or networks, are designed as combinations of mainly three fundamental components: resistor, capacitor, and inductor. They are … Continue reading →

Daily vitamin D was more effective than weekly, and monthly administration was the least effective. Is a daily supplement of vitamin D better than a monthly? In conclusion, our results show that a monthly dose of 50,000 IU of vitamin … Continue reading →

Multiply the battery’s current (as measured through the resistor) by the time taken for the voltage to decrease to 12 volts to determine the rating for a half-charge. Multiply this number by two to find your battery’s true AH rating. … Continue reading →