If aglass plateis placed between plates of a capacitor, in series with a lighted bulb, the brightness of the bulb.
Correct answer: B. Decreases
- A. Remains same
- B. Decreases
- C. Increases
- D. Bulb turns off
Explanation
If the capacitor takes a longer time to charge and discharge, the current flowing through the bulb decreases. Therefore, when a glass plate is inserted between the plates of a capacitor in series with a lighted bulb, the brightness of the bulb decreases
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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