The instrument that measures atmospheric pressure is MCQ with Answer and Explanation

Question
The instrument that measures atmospheric pressure is
A. Hydrometer
B. Manometer
C. Lactometer
D. Barometer
Answer: Option D
Solution (By JKSSB Mock Tests)
Barometer measures atmospheric pressure. Mercury barometer (Torricelli) standard. Aneroid barometer. Manometer measures pressure difference. Hydrometer density. Lactometer milk purity.
This question belongs to: Science Physics
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Practice More Physics Questions

Question #1
A wire of resistance 5 Ω is bent into a circle. The effective resistance between ends of a diameter is
A. 10 Ω
B. 2.5 Ω
C. 1.25 Ω
D. 5 Ω
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Correct Answer: Option C

Explanation:
Circle total resistance 5 Ω. Across diameter, two halves in parallel, each half 2.5 Ω. Parallel: R = (2.5×2.5)/(2.5+2.5) = 6.25/5 = 1.25 Ω. Equal parallel resistors gives half of each.
This question belongs to: Science Physics
Question #2
The SI unit of momentum is
A. kg m/s
B. N s
C. N/m
D. J s
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Correct Answer: Option A

Explanation:
kg m/s, same as impulse unit N s.
This question belongs to: Science Physics
Question #3
In a transistor, the collector current is 1 mA and base current 10 μA. Emitter current is
A. 0.99 mA
B. 1.01 mA
C. 1.1 mA
D. 0.9 mA
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Correct Answer: Option B

Explanation:
I_E = I_C + I_B = 1 mA + 0.01 mA = 1.01 mA.
This question belongs to: Science Physics
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