The Electromotive Force And Internal
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1. The electromotive force and internal
resistance of the dry cell in the circuit below is 1.5 V and 0.5 ohm respectively.
What is the reading of the voltmeter when the switch is closed? (SPM04) A. 0V B. 1.5V C. Less than 1.5 V D. More than 1.5 V Ans: C E = V + Ir 1.5 = V + I(0.5) , then rearrange he equation, V= 1.5 – 0.5(I) Thus V is less than 1.5V 2. Which circuit can be used to determine the electromotive force of a battery? (SPM
05)
Ans: C , If the switch is opened, the voltmeter across battery will give the e.m.f reading
resistance of the dry cell in the circuit below is 1.5 V and 0.5 ohm respectively.
What is the reading of the voltmeter when the switch is closed? (SPM04) A. 0V B. 1.5V C. Less than 1.5 V D. More than 1.5 V Ans: C E = V + Ir 1.5 = V + I(0.5) , then rearrange he equation, V= 1.5 – 0.5(I) Thus V is less than 1.5V 2. Which circuit can be used to determine the electromotive force of a battery? (SPM
05)
Ans: C , If the switch is opened, the voltmeter across battery will give the e.m.f reading
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