The device which maintains a constant potential difference between its ends is called
- battery
- multimeter
- ammeter
- electric bulb
The Correct Option is A
Approach Solution - 1
- Battery: A battery is designed to maintain a constant potential difference across its terminals by converting chemical energy into electrical energy. Thus, it consistently provides voltage.
- Multimeter: This device measures electrical properties like voltage, current, and resistance. It does not maintain a potential difference.
- Ammeter: An ammeter measures current in a circuit; it doesn't maintain a potential difference.
- Electric Bulb: This device converts electrical energy into light and does not maintain a potential difference.
Therefore, the correct choice is a Battery because it consistently maintains a potential difference across its terminals.
Approach Solution -2
The device that is used to maintain a constant potential difference across a circuit is a: Battery. A battery supplies a constant voltage (potential difference), which drives electric current through a circuit.
- Multimeter is used to measure voltage, current, or resistance.
- Ammeter is used to measure current.
- Electric bulb uses electric energy but does not maintain potential difference.
Final Answer: battery
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