CSS 2010 Physics — MCQs

i ^ + 2 j ^ + k ^ B = 4\hat{i} + 2\hat{j} + \hat{k} B = 4 i ^ + 2 j ^ ​ + k ^ then

• A⋅
• BA \cdot B A ⋅ B equals: A 8 i ^ + 12 j ^ − 3 k ^ 8\hat{i} + 12\hat{j} - 3\hat{k} 8 i ^ + 12 j ^ ​ − 3 k ^ B 17
• C23
• DNone of these 2 If A = 6 i ^ − 8 j ^ A = 6\hat{i} - 8\hat{j} A = 6 i ^ − 8 j ^ ​ , then 4 A 4A 4 A has the magnitude: A 40 B 10 C 20 D None of these 3 A force acting on a particle is conservative if: A It obeys Newton's third law B It obeys Newton's second law C It works equals the change in Kinetic energy D None of these 4 A Carnot Cycle is: A a rectangle on a P-V graph B bounded by two isotherms and two adiabatics C any four sided process on a P-V graph D None of these