The atmosphere exerts pressure because MCQ with Answer and Explanation
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Question #1
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What is the primary function of a rectifier in an electrical circuit?
Correct Answer: Option D
Explanation:
A rectifier is an electrical device composed of one or more diodes that allows current to flow only in one direction. Its primary function is to convert Alternating Current (AC), which periodically reverses direction, into Direct Current (DC), which flows in only one direction. The reverse process (DC to AC) is done by an inverter.
A rectifier is an electrical device composed of one or more diodes that allows current to flow only in one direction. Its primary function is to convert Alternating Current (AC), which periodically reverses direction, into Direct Current (DC), which flows in only one direction. The reverse process (DC to AC) is done by an inverter.
Question #2
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A lens has power +1 D. Its focal length in cm is
Question #3
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What is the relationship between the time period (T) and frequency (f) of a wave?
Correct Answer: Option B
Explanation:
Frequency (f) is defined as the number of complete oscillations or cycles a wave makes in one second (measured in Hertz). The Time period (T) is the time taken to complete one full oscillation (measured in seconds). They are inversely related: T = 1/f. If a wave has a frequency of 50 Hz, its period is 1/50 seconds.
Frequency (f) is defined as the number of complete oscillations or cycles a wave makes in one second (measured in Hertz). The Time period (T) is the time taken to complete one full oscillation (measured in seconds). They are inversely related: T = 1/f. If a wave has a frequency of 50 Hz, its period is 1/50 seconds.
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