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12th Physics One Mark Study Material. We covered all the 12th Physics One Mark Study Material in this post for free so that you can practice well for the exam.
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12th Physics One Mark Mock test for Students
A thin hollow cylinder of Mass 10 kg and radius 0.4 m can rotate freely about its central axis. A rope is wound around it. What should be the tension in the rope to give the cylinder an angular acceleration of 2 rad/s²?
a) 6 N
b) 8 N
c) 10 N
d) 12 N
Option b – 8 N
A circular disc of radius R and thickness R/6 has a moment of inertia I about an axis through its centre and perpendicular to its plane. If the disc is melted and reshaped into a Solid sphere, what will be the moment of inertia of the sphere about its diameter?
a) I
b) I/5
c) I/3
d) 2I/5
Option b – I/5
The handle of a floor grinding machine is fixed close to the rim in order to:
a) Minimise friction
b) Keep the system balanced
c) Obtain a larger torque using the same applied force
d) Improve the appearance of the machine
Option c – Obtain a larger torque using the same applied force
A Solid cylinder of Mass 50 kg and radius 0.5 m is free to rotate about its horizontal axis. A string is wrapped around the cylinder, with one end attached and the other hanging freely. What tension in the string will produce an angular acceleration of 2 rad/s²?
a) 50 N
b) 25 N
c) 75 N
d) 100 N
Option b – 25 N
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- Arihant DC Pandey Physics JEE
- 12th Std Physics One Mark Questions
- 12th Physics Slow Learners Study Material
