A hat will happen to the ammeter reading when switch S is closed? 2002 he reading will decrease as compared to the reading when the switch is open he reading will remains the same as compared to the reading when the switch is open he reading will increase as compared to the reading when the switch is open he reading will be doubled as compared to the reading when the switch is open 560 Ω S

A hat will happen to the ammeter reading when switch S is closed? 2002 he reading will decrease as compared to the reading when the switch is open he reading will remains the same as compared to the reading when the switch is open he reading will increase as compared to the reading when the switch is open he reading will be doubled as compared to the reading when the switch is open 560 Ω S

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section21.7: Resistors In Series And Parallel

Problem 21.5QQ

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Analog meters use a galvanometer, which essentially consists of a coil of wire with a small resistance and a pointer with a scale attached. When current runs through the coil, the pointer turns; die amount the pointer turns is proportional to the amount of current running through the coil. Galvanometers can be used to make an ammeter if a resistor is placed in parallel with the galvanometer. Consider a galvanometer that has a resistance of 25.00and gives a full scale reading when a 50A current runs through it. The galvanometer is to be used to make an ammeter that has a full scale reading of 10.00 A, as shown below. Recall that an ammeter is connected in series with the circuit of interest, so all 10 A must tun through the meter, (a) What is the current through the parallel resistor in the meter? (b) What is the voltage across the parallel resistor? (c) What is the resistance of the parallel resistor?
The switch S in Figure 20.27 is closed at t = 0 and the current at a reference time tref 0 is Iref. If the circuit is changed as, described below and the switch is again dosed at t = 0, determine whether the current I at the same time would be greater than, less than, or equal to the original value of Iref. Indicate your answers wilt G. L. or E, respectively. (a) Both the battery voltage and the resistance R are doubled. (b) The inductance L b doubled. (c) The battery voltage . the resistance R, and the inductance L are each doubled. Figure 20.27 A series RL circuit. As the current increases toward its maximum value, the inductor produces an emf that opposes the increasing current.
Find the direction of the current in the resistor shown in Figure P20.16 (a) at the instant the switch is closed, (b) after the switch has been closed for several minutes, and (c) at the instant the switch is opened. Figure P20.16
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Verify that alter a time of 10.0 ms, the current for the situation considered in Example 23.9 will be 0.183 A as stated.
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