# Electrotechnics N4

a circuit with 3 resisters {9 ohms 10 ohms and 12 ohms} connected in parallel with the source 150v\50HZ.use kitchoffs law to find the current of the circuit and the current across each resister?

1. 👍 0
2. 👎 0
3. 👁 61
asked by hlehle
1. R1 = 9 Ohms.
R2 = 10 Ohms.
R3 = 12 Ohms.

1/Rt = 1/R1 + 1/R2 + 1/R3,
1/Rt = 1/9 + 1/10 + 1/12 = 0.294444,
Rt = 3.4 Ohms.

It = E/Rt = 150/3.4 = 44.1A.

I1 + I2 + I3 = It = 44.1A.
Let I3 = I,
I2 = (12/10)*I = 1.2I.
I1 = (12/9)*I = 1.33I.

1.33I + 1.2I + I = 44.1,
3.53I = 44.1,
I = I3 = 12.49A.
1.2I = I2 = 1.2*12.49 = 14.99A.
1.33I = I1 = 1.33*12.49 = 16.61A.

It = I1 + I2 + I3,
It = 16.61 + 14.99 + 12.49 = 44.1A.

1. 👍 0
2. 👎 0
posted by Henry

## Similar Questions

1. ### Science

There Are Three Resistance In A Parallel Circuit. Two Of Them Are Rated At 20 Ohms, The Other At 10 Ohms. What Is The Circuit's Total Resistance? I believe the answer D 5ohms A. 20 ohms b. 12 ohms c. 8 ohms d. 5 ohms

asked by Jenny on February 28, 2009
2. ### Physics

A battery with voltage drop of 120V is connected in a ciruit containing both series and parallel. Moving in a clockwise direction. R1= 3 ohms there is a connection of point A to point B. In between there is a parallel circuit with

asked by Andrea on March 19, 2008
3. ### physics

A 15.0 Ohms resistor is connected in series to a 120V generator and two 10.0 Ohms resistors that are connected in parallel to each other. -What is the total resistance of the load? -What is the magnitude of the circuit current?

asked by Rony on February 17, 2010
4. ### Algebra

Two lamps can be connected to a battery in a circuit in series or in parallel. You can calculate the total resistance RT (t is down from r) in a circuit if you know the resistance in each lamp. Resistance is measured in ohms. For

asked by Anonymous on May 9, 2014
5. ### Science

One light bulb in a string of lights goes out this causes all other lights in string to go out. This is example of A. Resistor B. parallel circuit C. Closed circuit***** D. Series circuit When a switch is turned from the off to

asked by BUBBLES on March 1, 2015
6. ### Physics

A 5 ohms resistor is connected in parallel with the series assemvly of 2 ohms and 3 ohms resistors. The voltage drop across the 2 ohms resistor is 6V. What is the current through the 5 ohms resistor?

asked by Lyn on April 21, 2019
7. ### physics

Please check my work here: Resistors of 30 ohms and 60 ohms are connected in parallel and joined in series to a 10 ohm resistor. The circuit voltage is 180 volts. Find: a)the voltage of the parallel circuit b)the voltage across

asked by Nilan - still need help on May 19, 2011
8. ### physics, please help!

(a) Find the current in each resistor of the circuit shown in the figure byusing the rules for resistors in series and parallel. (b) Write three independent equations for the three currents using Kirchhoff’s laws: one with the

asked by Amber on November 28, 2012
9. ### Science

Use Ohm’s Law to determine the resistance in a circuit if the voltage is 12.0 volts and the current is 4.0 amps. A.8.0 ohms B. 48 ohms C.3.0 ohms** D.12 ohms

asked by Hehe ;) on December 11, 2017
10. ### Physics - Circuits

Theres a circuit wired in series that has 4 resistors. 1) 10 ohms 2) 6 ohms 3) 1 ohms 4) 2 ohms Find the potential difference across the 10ohm resistor. Answer in units of V What exactly am i supposed to do to calculate this?

asked by Anonymous on February 14, 2012

More Similar Questions