General Science - Online Test
Total electric power required, P = 800 kW
supply voltage V = 220 volt
voltage at which electric plant generating power V1 = 440 volt
distance between town and power generating station, d = 15 km
total resistance of two wire cable R = (15+15) x 0.5 = 15 ohm
input voltage of transformer Vi = 4000 volt
output voltage of transformer Vo = 220 volt
current in wire line
line power loss
For the given circuit , with cell e m f = 10 V and internal resistance = , which of the following is correct?
The circuit is reduced to find equivalent resistance as follows;
In (1), 2Ω, 4 Ω, and 2 Ω are in series. Their equivalent resistance is 8 Ω. In (2), the two 8 Ω resistors are in parallel and their equivalent resistance is 4 Ω. In (3) 2 Ω, 4 Ω, and 2 Ω are in series. Their equivalent resistance is 8 Ω which is in parallel with the 8 Ω resistance as shown in (4). The total resistance in the circuit
R= 3+4+2+1( internal resistance)=10 Ω. The current through the 3 Ω resistor
I = E/R = 10/10
I = 1A
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