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    				| 1. | 2)State and explain Joule's law.A voltmeter is connected across a battery of emf 12V and internal resistance of 10Ω. If the voltmeterresistance 230Ω calculate the current flowing through the resistance and reading shown by thevoltmeter.(I A, V 11.5v)20 * | 
| Answer» Since V is directly proportional to R in series thereforereading will be 230/240×12=23/2V=11.5V | |