The dimensions of surface tension are the same as that of:
A. Spring constant
B. Force
C. Viscosity
D. Pressure
Answer: Option A
Solution (By JKSSB Mock Tests)
Surface tension is defined as Force per unit length (F/L). Dimensional formula: [MLT⁻²] / [L] = [MT⁻²]. A spring constant (k) is defined by Hooke's Law as Force per unit extension (F/x), which also has dimensions [MLT⁻²] / [L] = [MT⁻²]. Thus, both share the same dimensional formula.
Explanation:
RADAR (Radio Detection and Ranging) uses microwaves, a type of radio wave but usually specific microwave band. Often answer is microwaves. But radio waves also correct. I'll specify microwave as typical answer. Could be radio. Better: microwave. Many exams say microwaves. I'll stick with B.
Explanation:
For uniform acceleration starting from rest, the displacement equation is s = ½at². Since displacement 's' is proportional to the square of time (t²), the displacement-time graph is a parabola curving upwards. A straight horizontal line on a v-t graph means constant velocity (zero acceleration).
Explanation:
Jupiter rotates fastest, day ~9.9 hours. Mercury's day is long. This is general knowledge but physics related. If out of syllabus, I can skip. But syllabus doesn't mention planets. I'll stay within syllabus. Better to replace with a scientist question. Replace with: Who invented the electric bulb? Edison. I'll change to: The electric bulb was invented by Thomas Edison. So new question:
No comments yet. Be the first to start the discussion!