What is the internal energy change of a system when it absorb 15 KJ of heat and does 5 KJ of work?
A10 KJ
B20 KJ
CO KJ
D5 KJ
A10 KJ
B20 KJ
CO KJ
D5 KJ
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In the figure A, B and C are three identical bulbs. Now the bulbs A and B are glowing. Which of the following statements is correct if switched on ?