power
what is a formula for power total
pt= p1 + p2 + p3 +pn
Pt= It x Et
what is a formula for finding total resistance in a parallel circuit
1/Rt = 1/r1 + 1/ r2 + 1/r3
Rt= (R1xR2)/(R1+R2)
Rt = Rx/n
formula for finding volt total in parallel
Vt= V1 +V2 +V3 ... etc
why is current The same in a DC series circuit
There is only One path for current to flow in
what is the defining characteristic of a parallel circuit
there is more then one path for current to flow, and the total current is the sum of the individual components
define the direct method for finding total power
when power is determined from the total current, total resistance, and source voltage.
if all resistors are the dame in a parallel circuit what formula should be usesd
Rt= Rx /n
why is the electromotive force the same in a parallel circuit
because each branch is connected to the positive and negative terminal of the source voltage
formula to find total current when current across each load is known
It= I1 +I2 +I3 ... etc
adding parallel loads to a circuit will ? the total circuit resistance and ? the total circuit current
decrease and increase
define the indirect method is used to solve for total power
used to determine total power in a parallel circuit from the sum of the individual power consumptions of the loads in the circuit
what is the rule for parallel circuit resistance
total resistance is always less than the smallest branch resistor
why would you ever want to connect batteries in parallel
to increase the duration the circuit is supplied with voltage
why isnt current the same in a parallel circuit
there is more than one path for current to flow
The ratio of the speeds of pulleys is inversely proportional to the ratio of their diameters. The speed reduction required on a pulley and belt drive is 4 to 1. If the drive is 4 inches in diameter, what size would be required for the driven pulley?
16 inches
give an example of direct and indirect power calculations
Pt= It x Et
Pt = P1 + P2 + Pn
3 methods of finding resistance in parallel circuit
reciprocal, product over sum, equal value variation
two batteries with the same polarity are in parallel, E1 is 6volts and E2 is 6 volts how many volts would be applied to the circuit?
6 volts
two batteries with the same polarity are in parallel, E1 is 6amps and E2 is 6 amps how many amps would be applied to the circuit?
12 amps
2 batteries are connect in parallel with different polarities E1= 24 volts and E2 = 12 volts how much voltage would would be supplied?
none it creates a short circuit, causing rapid discharge and potential damage
A circuit contains nine 250-watt lamps connected in parallel across a 120-volt circuit. How much power is consumed by the circuit?
2250 W
Find R total Et-48 R1-28 Ohms R2-70 Ohms
20 Ohms
Determine the voltage across R2? B1 has a current of .5 amps, R1- 30 Ohms, R2- 75 Ohms
15V
If two 6-volt sources are connected in parallel to supply a 24-ohm load, how much current will flow in the circuit?
.25A
solve for X and Y, 250/900 = 240/X = 6/Y
X=864
Y= 21.6