A cork floats on water because its density is MCQ with Answer and Explanation

A cork floats on water because its density is
A. Greater than that of water
B. Less than that of water
C. Zero
D. Equal to that of water
Answer: Option B
Solution (By JKSSB Mock Tests)
Objects float if their density is less than the fluid. Cork density < water density, so it floats. Iron sinks because density > water. Ship made of iron floats due to shape displacing more water, average density less.

Discuss this Question (0)

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

Practice More Physics Questions

Question #1
A step-down transformer has turns ratio 10:1. Input voltage 220 V, output voltage is
A. 110 V
B. 22 V
C. 2200 V
D. 440 V

Correct Answer: Option B


Explanation:
Vs/Vp = Ns/Np = 1/10 => Vs = 220/10 = 22 V.

This question belongs to: Science Physics
Question #2
A body starts from rest and moves with uniform acceleration. The ratio of distances covered in 1st, 2nd, and 3rd seconds is
A. 1:1:1
B. 1:4:9
C. 1:3:5
D. 1:2:3

Correct Answer: Option C


Explanation:
s_nth = u + a/2 (2n-1). u=0, so distances proportional to (2n-1): 1,3,5.

This question belongs to: Science Physics
Question #3
The relation V = IR is applicable to
A. Semiconductors
B. Ohmic conductors
C. Non-ohmic devices
D. Gaseous conductors

Correct Answer: Option B


Explanation:
Ohm's law V=IR is linear relationship, valid for ohmic materials like metals at constant temperature. Non-ohmic do not follow linear I-V. Semiconductors are non-ohmic.

This question belongs to: Science Physics