Electricity

For the circuit in series:
E=100v
Resistor 1 = 3 kΩ
Resistor 2 = 4 kΩ
Resistor 3 = 1 kΩ, p= 200mW
Resistor 4 = R

find the following quantities:
a. The circuit currents
b. The total resistance of the circuit
c. The value of the unknown resistance, 6.
d. The voltage drops across all resistors in the circuit.
e. The power dissipated by all resistors.

  1. 👍 0
  2. 👎 0
  3. 👁 138
  1. Again, one has to have a circuit diagram of how exactly the resistors are connected.

  2. its in a series with 4 resistors and one cell battery

    1. 👍 0
    2. 👎 0
  3. Given:
    E = 130 Volts. 100v. is too low for the given circuit values.
    R1 = 3k.
    R2 = 4k.
    R3 = 1k, P3 = 200mW.
    R4 = ?

    a. P3 = V3^2/R3 = 200.
    V3^2/1 = 200,
    V3 = 14.14 volts.
    I3 = V3/R3 = 14.14/1=14.14 mA = I1 = I2 = I4.

    b. V4 = E - I(R1+R2+R3) = 130 - 14.14mA*(8k) = 16.88 volts.
    R4 = V4/I4 = 16.88/14.14 = 1.2k ohms.
    Rt = 3 + 4 +1 + 1.2 = 9.2k.

    c. R4 = 1.2k(see part b).

    d. V1 = 14.14 * 3 = 42.42 Volts.
    V2 = 14.14 * 4 = 56.56 Volts.
    V3 = 14.14 * 1 = 14.14 Volts.
    V4 = 14.14 * 1.2 = 16.97 Volts.

    e. P1 = V1 * I = 42.42 * 14.14 = 600 mW.
    P2 = 56.56 * 14.14 =
    P3 = 14.14 * 14.14 =
    P4 = 16.97 * 14.14 =

    Note: All power in mW. All currents in mA.

    1. 👍 0
    2. 👎 0
    posted by henry2,

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    1)If a resistor is added to a parallel circuit, the equivalent resistance: A)increases B)decreases C)remains the same D)becomes zero I got B 2)A 10.0 resistor, 20.0 resistor, and 25.0 resistor are connected in series across a

    asked by Jon on April 9, 2008
  2. Physics

    A 10.0 Ω resistor is hooked up in series with an 8.0 Ω resistor followed by a 27.0 Ω resistor. The circuit is powered by a 9.0 V battery -Calculate the equivalent resistance. -Calculate the voltage drop across each resistor in

    asked by Me and I on June 2, 2014
  3. Electronics, Physics

    In a circuit, a 10 Ω resistor is connected in series to a parallel group containing a 60 Ω resistor and a 5 Ω resistor. What is the total resistance in this circuit? A formula and explanation would be great!

    asked by Vicki on May 12, 2015
  4. Physics

    Could some one tell m if this is right? 1)Does currend flow through a resistor or across a resistor in a series circuit? THROUGH 2) Is a voltage establishes through a resistor or across ? ACROSS PARALLEL CIRCUITS 1)there is a

    asked by joshua on March 25, 2009
  5. science

    laboratory connects a 16§Ù resistor, 23§Ù resistor, and a 34§Ù resistor in series and then comes the arrangement to a 36V dc source. How much current is in the circuit?

    asked by alex on December 17, 2011
  6. Physics

    1. A 40Ω , 20Ω and 60Ω resistor is connected in a parallel circuit. Which resistor would have the greatest current passing through it and why? 2. A 24Ω , 8Ω and 60Ω resistor is connected in a series circuit. Which resistor

    asked by Liz on May 8, 2014
  7. Physics

    A filament bulb and a resistor are connected in series to a battery. Which of the following will contribute to the load of the circuit? A. Bulb B. resistor C. Bulb and resistor D. none I'm thinking the resistor, but I'm unsure.

    asked by Need some help on January 24, 2013
  8. Physics

    A filament bulb and a resistor are connected in series to a battery. Which of the following will contribute to the load of the circuit? A. Bulb B. resistor C. Bulb and resistor D. none I'm thinking the resistor, but I'm unsure.

    asked by Need some help on January 23, 2013
  9. physics

    a battery of three cell is series each of emf two volt and internal resistant 0.5 ohms is connected to a two ohm resistor in series with a parallel combination of 2.3 ohms resistor draw the circuit diagram and calculate effective

    asked by violet on June 29, 2015
  10. physics.

    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 I need to find 1)the voltage of the parallel circuit 2)the resistance of the complete circuit

    asked by Nilan - please help on May 18, 2011

More Similar Questions