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

The instrument that measures atmospheric pressure is
A. Hydrometer
B. Barometer
C. Lactometer
D. Manometer
Answer: Option B
Solution (By JKSSB Mock Tests)
Barometer measures atmospheric pressure. Mercury barometer (Torricelli) standard. Aneroid barometer. Manometer measures pressure difference. Hydrometer density. Lactometer milk purity.

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Practice More Physics Questions

Question #1
A satellite is orbiting close to Earth's surface. Its orbital speed is (g = 10 m/s², R = 6400 km)
A. 8 km/s
B. 4 km/s
C. 11.2 km/s
D. 16 km/s

Correct Answer: Option A


Explanation:
v = √(gR) = √(10×6400×10³) = √(64×10⁶) = 8×10³ m/s = 8 km/s. Escape velocity 11.2 km/s.

This question belongs to: Science Physics
Question #2
A 100 W bulb is used for 10 hours. Energy consumed is
A. 10 kWh
B. 100 kWh
C. 0.1 kWh
D. 1 kWh

Correct Answer: Option D


Explanation:
Energy = 0.1 kW × 10 h = 1 kWh.

This question belongs to: Science Physics
Question #3
In a series circuit, which quantity remains the same across all components?
A. Voltage
B. Resistance
C. Current
D. Power

Correct Answer: Option C


Explanation:
In series circuits, current is the same through all components because there's only one path for charge flow. Voltage divides across components proportional to resistance (V = IR). Resistance and power vary per component. Memory aid: 'Series: same current; Parallel: same voltage'. This fundamental circuit property is frequently tested in competitive exams to assess basic electronics understanding. Always apply Kirchhoff's current law: current entering a junction equals current leaving; in series, no junctions, so current constant.

This question belongs to: Science Physics