2 When an ammeter is connected in series with a cell of negligible internal resistance and...

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2 When an ammeter is connected in series with a cell of negligible internal resistance and a lamp, the current reading is 0.2A. A voltmeter connected across the terminals of the cell reads 1.5V. Two similar cells and three similar lamps are used in the circuit shown below. (a) Lamp A Lamp B Switch closed Lamp C Q R Determine the current to be at point Q and R when the switch is first closed and then opened. Switch opened Switch closed (b) When switch S is opened, what is the potential difference between P and R? (c) When the switch S is closed, what is the potential difference between P and R? (d) Explain the difference in the brightness, if any, of the lamps when the switch is first opened and then closed. (Hint: Brightness is specified by the power. P = IV) Switch opened... 2 When an ammeter is connected in series with a cell of negligible internal resistance and a lamp, the current reading is 0.2A. A voltmeter connected across the terminals of the cell reads 1.5V. Two similar cells and three similar lamps are used in the circuit shown below. (a) Lamp A Lamp B Switch closed Lamp C Q R Determine the current to be at point Q and R when the switch is first closed and then opened. Switch opened Switch closed (b) When switch S is opened, what is the potential difference between P and R? (c) When the switch S is closed, what is the potential difference between P and R? (d) Explain the difference in the brightness, if any, of the lamps when the switch is first opened and then closed. (Hint: Brightness is specified by the power. P = IV) Switch opened...

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The image shows a circuit with two cells in parallel three lamps labeled A B and C and a switch labeled S Theres also a set of questions regarding the current at points Q and R the potential differenc... View the full answer