A battery of 12 volts is connected to three resistors of 4 Ohm, 5 Ohm and 3 Ohm joined together in parallel. The current through the 3 - Ohm resistances is _.
Correct answer: D. 4.0A
- A. 1.0A
- B. 2.5A
- C. 3.0A
- D. 4.0A
Explanation
In parallel arrangement, each resistor provides an alternate path to the current between the end points which means that current I is divided.Sindh Textbook for Class XII P95In parallel connection, the potential difference between terminals of each resistor must be same.Sindh Textbook for Class XI P96 Since the voltage is constant is all the resistors, the voltage across 3 ohm resistor will be 12 volts too V= IR12 = I × 3I = 12/3I = 4 A
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