(a) An ammeter, 5 ohms resistor, a key and a battery are connected in series.  

Question

The  voltmeter is connected across the resistor.

(i) Put the above information in a circuit diagram

(ii) Find the voltmeter reading if the ammeter reading is 0.8A

 

(b) Two resistors R1 and R2 are connected in parallel.  Derive the formula for the  effective resistance R.

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