The part of the refrigerator that absorbs heat from the interior is MCQ with Answer and Explanation
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Question #1
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Which of the following is an example of a longitudinal wave?
Correct Answer: Option D
Explanation:
In a longitudinal wave, the particles of the medium vibrate back and forth parallel to the direction of wave propagation (creating compressions and rarefactions). Sound waves traveling through air are mechanical longitudinal waves. Light and radio waves are transverse electromagnetic waves, while surface water waves are a combination of both.
In a longitudinal wave, the particles of the medium vibrate back and forth parallel to the direction of wave propagation (creating compressions and rarefactions). Sound waves traveling through air are mechanical longitudinal waves. Light and radio waves are transverse electromagnetic waves, while surface water waves are a combination of both.
Question #2
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Which of the following physical quantities is an example of a vector quantity?
Correct Answer: Option A
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 #3
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Which combination of logic gates is universally known as a 'Universal Gate' because it can be used to construct any other basic logic gate (AND, OR, NOT)?
Correct Answer: Option C
Explanation:
NAND (NOT-AND) and NOR (NOT-OR) gates are called Universal Gates in digital electronics. By cleverly combining multiple NAND gates (or multiple NOR gates) together, one can perfectly replicate the logical function of any basic gate (NOT, AND, OR) without needing the actual basic gates themselves.
NAND (NOT-AND) and NOR (NOT-OR) gates are called Universal Gates in digital electronics. By cleverly combining multiple NAND gates (or multiple NOR gates) together, one can perfectly replicate the logical function of any basic gate (NOT, AND, OR) without needing the actual basic gates themselves.
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