The efficiency of a machine is defined as: MCQ with Answer and Explanation
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Question #1
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Which of the following physical quantities is an example of a vector quantity?
Correct Answer: Option B
Explanation:
A vector quantity possesses both magnitude and a specific spatial direction, and it must obey the laws of vector addition. Electric field intensity is a vector (force per unit charge, having the direction of the force). Electric current has a direction in circuits but adds algebraically like a scalar (violating vector addition). Charge and potential are standard scalars.
A vector quantity possesses both magnitude and a specific spatial direction, and it must obey the laws of vector addition. Electric field intensity is a vector (force per unit charge, having the direction of the force). Electric current has a direction in circuits but adds algebraically like a scalar (violating vector addition). Charge and potential are standard scalars.
Question #2
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The process of evaporation causes
Question #3
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The number of neutrons in ²³⁸₉₂U is
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