College Physics

When switch S in the figure is open, the voltmeter V of the battery reads 3.13V . When the switch is closed, the voltmeter reading drops to 2.90V , and the ammeter A reads 1.70A. Assume that the two meters are ideal, so they do not affect the circuit.
emf= V
sorry I left out the V and the A earlier.

  1. 👍
  2. 👎
  3. 👁
  1. Both posts are statements. Nowhere do you ask a question.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    a battery has an e.m.f of 6 volts and an internal resistance of 0.4 is connected to a 2.6 ohm resistor through a SPST{single pole,single throw}switch.when the switch is closed,the potential difference between the terminals

  2. Circuits, Kirchoff

    A circuit can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.0mandCisa sliding contact on this wire. A standard resistor R is included in the circuit. The

  3. Science

    Consider a lead-acid battery with 500 Ah capacity and a rated voltage of 12 V. a)What is the total capacity of energy in watt-hours that can be stored in the battery? b)Assume that the battery is completely empty. The battery is

  4. Physics EM

    A battery with EMF 90.0 V has internal resistance R_b = 8.68 Omega. What is the reading V_v of a voltmeter having total resistance R_v = 485 \Omega when it is placed across the terminals of the battery? Express your answer with

  1. Physics

    A circuit has R = 16.6 Ω and the battery emf is 6.50 V . With switch S2 open, switch S1 is closed. After several minutes, S1 is opened and S2 is closed. 1) At 2.14 ms after S1 is opened, the current has decayed to 0.235 A .

  2. Science

    Which choice most accurately explains the role of a circuit component in preventing a circuit from getting too hot and catching fire? (Select all that apply) 1-A fuse can be used to prevent a circuit from getting too hot. It will

  3. Physics

    When potential difference across the terminals of a battery is measured using an analogue voltmeter of resistance 95 ohms, the reading on the voltmeter is 5.70 V. When it is measured using a very high resistance digital meter the

  4. science

    Why does a light go out when you turn off the wall switch? A. The switch changes the direction of the flow of electrons. B. The switch causes a break in the circuit. C. The switch changes the circuit from series to parallel. D.

  1. Physics

    What is the maximum equipment needed to determine the power dissipated in a resistor of unknown value? 1) a voltmeter, only 2) An ammeter only, 3) a voltmeter and an ammeter only 4) a voltmeter, an ammeter, and a stopwatch

  2. Physics

    A battery charger is connected to a dead battery and delivers a current of 4.5 A for 6.0 hours, keeping the voltage across the battery terminals at 12 V in the process. How much energy is delivered to the battery?

  3. Circuits, Kirchoff

    Can someone help me to answer the following? (b) The circuit shown in Figure 1 can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.0 m and C is a sliding

  4. Physics

    A 5.0 ohm resistor, a 15.0 ohm resistor and a unmarked resistor are connected as shown with a 15 volt source. The ammeter reads a current of .50 ampere. a) calculate the reading of the the voltmeter across the 5.0 ohm resistor

You can view more similar questions or ask a new question.