The apparent weight of a person in an elevator moving downwards with an acceleration 'a' (where a < g) is: MCQ with Answer and Explanation
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Question #1
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A thermometer reads 25°C. What is the corresponding temperature in Kelvin?
Correct Answer: Option B
Explanation:
To convert a temperature from Celsius to Kelvin, the formula is K = °C + 273.15. For most physics problems, we use 273. Therefore, K = 25 + 273 = 298 K. Kelvin is the SI unit of temperature, and it never uses a degree symbol.
To convert a temperature from Celsius to Kelvin, the formula is K = °C + 273.15. For most physics problems, we use 273. Therefore, K = 25 + 273 = 298 K. Kelvin is the SI unit of temperature, and it never uses a degree symbol.
Question #2
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Simple pendulum period T = 2π√(l/g). If length quadrupled, T becomes:
Question #3
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A galvanometer can be converted into an ammeter by connecting:
Correct Answer: Option D
Explanation:
An ammeter must have very low resistance so it does not alter the circuit current it is measuring. To convert a sensitive galvanometer into an ammeter, a very low resistance called a 'shunt' is connected in parallel to it. This diverts most of the current away from the delicate galvanometer coil while still allowing a proportional measurement.
An ammeter must have very low resistance so it does not alter the circuit current it is measuring. To convert a sensitive galvanometer into an ammeter, a very low resistance called a 'shunt' is connected in parallel to it. This diverts most of the current away from the delicate galvanometer coil while still allowing a proportional measurement.
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