A lactometer is used to check MCQ with Answer and Explanation

Question

Share Report Error

A lactometer is used to check

A. Blood pressure

B. Purity of water

C. Humidity

D. Purity of milk

Answer: Option D

Solution (By JKSSB Mock Tests)

Measures specific gravity of milk, indicates adulteration.

This question belongs to: Science Physics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1

Share Report

A spring of spring constant k is stretched by x. The potential energy stored is

A. ½kx

B. ½kx²

C. kx²

D. kx

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
Elastic potential energy stored in a stretched/compressed spring is ½kx², where x is displacement from equilibrium. This is work done against spring force which is average force times displacement. Work = ½Fx = ½(kx)x = ½kx². Similar to capacitor energy ½CV².

This question belongs to: Science Physics