The term 'latent heat' was introduced by MCQ with Answer and Explanation
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Question #1
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The energy equivalent of 1 g mass is
Question #2
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Two masses, M1 = 3 kg and M2 = 2 kg, are connected by a light inextensible string passing over a frictionless pulley (Atwood machine). The acceleration of the system is (Take g = 10 m/s^2):
Correct Answer: Option B
Explanation:
For an Atwood machine, the common acceleration of both masses is given by the formula a = [(M1 - M2) / (M1 + M2)] * g. Substituting the given values: a = [(3 - 2) / (3 + 2)] * 10 = (1 / 5) * 10 = 2 m/s^2. The heavier mass accelerates downwards, the lighter one upwards.
For an Atwood machine, the common acceleration of both masses is given by the formula a = [(M1 - M2) / (M1 + M2)] * g. Substituting the given values: a = [(3 - 2) / (3 + 2)] * 10 = (1 / 5) * 10 = 2 m/s^2. The heavier mass accelerates downwards, the lighter one upwards.
Question #3
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What is the focal length of a plane mirror?
Correct Answer: Option B
Explanation:
The focal length of a spherical mirror is defined as R/2, where R is the radius of curvature. A plane mirror is essentially a part of a spherical mirror whose radius of curvature is infinity (it is completely flat). Therefore, the focal length of a plane mirror is also infinity.
The focal length of a spherical mirror is defined as R/2, where R is the radius of curvature. A plane mirror is essentially a part of a spherical mirror whose radius of curvature is infinity (it is completely flat). Therefore, the focal length of a plane mirror is also infinity.
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