Physics · Current Electricity
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When the current is neither drawn from a source nor given to it then:
- A
E=VT
- B
VT>E
- C
E>VT
- D
Both “VT>E” & “E>VT”
The potential difference between the terminals of a battery will be equal to the emf of the battery when there is no current. At this time, the potential drop across the internal resistance is zero. This only happens when there is no load placed on the battery which includes measuring the potential difference with the voltmeter. The terminal voltage will exceed the emf of the battery when current is driven backward through the battery, in at the positive terminal and out at its negative terminal.
VT> E = terminal voltage is greater than emf only when the cell is being charged.
E>VT= The emf of a cell is greater than its terminal voltage When current is drawn because there is some potential drop across the cell due to its small internal resistance.
The potential difference between the terminals of a battery will be equal to the emf of the battery when there is no current. At this time, the potential drop across the internal resistance is zero. This only happens when there is no load placed on the battery which includes measuring the potential difference with the voltmeter. The terminal voltage will exceed the emf of the battery when current is driven backward through the battery, in at the positive terminal and out at its negative terminal.
VT> E = terminal voltage is greater than emf only when the cell is being charged.
E>VT= The emf of a cell is greater than its terminal voltage When current is drawn because there is some potential drop across the cell due to its small internal resistance.
VT> E = terminal voltage is greater than emf only when the cell is being charged.
E>VT= The emf of a cell is greater than its terminal voltage When current is drawn because there is some potential drop across the cell due to its small internal resistance.
VT> E = terminal voltage is greater than emf only when the cell is being charged.
E>VT= The emf of a cell is greater than its terminal voltage When current is drawn because there is some potential drop across the cell due to its small internal resistance.
Tagged under Physics · Current Electricity · 2017