When there will be increase in the internal energy of a system?

If the system loses heat and performs work.

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If the system loses heat and work performed on the system both are negative.

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If the system gains heat and work performed on the system both are positive.

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If the system gains heat and performs work.

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Solution

The correct option is C
If the system gains heat and work performed on the system both are positive.

If heat gained by the system and work performed on the system both are positive, then internal energy will increase.

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When there will be increase in the internal energy of a system?

The correct option is C If the system gains heat and work performed on the system both are positive. If heat gained by the system and work performed on the system both are positive, then internal energy will increase.

The correct option is C
If the system gains heat and work performed on the system both are positive.

If heat gained by the system and work performed on the system both are positive, then internal energy will increase.