Yeah, I'm just confused if you have a battery attached to a wire with no physical resistor attached. What would be the current flowing through the wire? Power = Current * Voltage
A woman gave a speech using a wireless microphone. She began to dance and cry. The spare 9V alkaline battery in her pocket was shorted by a coin and was burning her.
I read somewhere (Energizer?) that a little battery can supply 10A. Maybe an AA Ni-MH cell.
A woman gave a speech using a wireless microphone. She began to dance and cry. The spare 9V alkaline battery in her pocket was shorted by a coin and was burning her.
I read somewhere (Energizer?) that a little battery can supply 10A. Maybe an AA Ni-MH cell.
I posted the link to an actual 9V data sheet. 9V/2.76Ω=3.2A into a short circuit from a fresh 9V. P=I²R, R=0, P=0
The most power that you can get is when the load resistance equals the source resistance. The maximum power available is P=V²/R, 4.5²/2.76=7.3W. Now if you are talking energy, that is a different story. You can charge a capacitor to what ever voltage, but that is energy and not power.
A woman gave a speech using a wireless microphone. She began to dance and cry. The spare 9V alkaline battery in her pocket was shorted by a coin and was burning her.
I read somewhere (Energizer?) that a little battery can supply 10A. Maybe an AA Ni-MH cell.
I did that with a metal-tab "C" Nicad. Stuck it in my pocket to free up a hand. Not sure where my brain was at that moment. The pocket was full of coins. Ouch..ouch...ouch!
I posted the link to an actual 9V data sheet. 9V/2.76Ω=3.2A into a short circuit from a fresh 9V. P=I²R, R=0, P=0
The most power that you can get is when the load resistance equals the source resistance. The maximum power available is P=V²/R, 4.5²/2.76=7.3W. Now if you are talking energy, that is a different story. You can charge a capacitor to what ever voltage, but that is energy and not power.
No, the capacitor will increase the peak instantanious power the battery can supply.
Connect a 47,000µF capacitor with a negligible ESR capacitor in parallel the battery, it will charge to nearly 9V in 0.7s. Connect a 1R resistor in parallel and the power dissipation will be 81W at the instant you connect it.
No, the capacitor will increase the peak instantanious power the battery can supply.
Connect a 47,000µF capacitor with a negligible ESR capacitor in parallel the battery, it will charge to nearly 9V in 0.7s. Connect a 1R resistor in parallel and the power dissipation will be 81W at the instant you connect it.
No, the capacitor will increase the peak instantanious power the battery can supply.
Connect a 47,000µF capacitor with a negligible ESR capacitor in parallel the battery, it will charge to nearly 9V in 0.7s. Connect a 1R resistor in parallel and the power dissipation will be 81W at the instant you connect it.