Electromagnetism
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Alternating Current
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Dual Nature of Radiation
MCQ (Single Correct Answer)
Semiconductor Devices and Logic Gates
MCQ (Single Correct Answer)
Communication Systems
MCQ (Single Correct Answer)
1
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

Four particles each of the mass m are placed at the corners of a square of side length $$l$$. The radius of gyration of the system about an axis perpendicular to the square and passing through its centre is

A
$$\frac{l}{\sqrt2}$$
B
$$\frac{l}{2}$$
C
$$l$$
D
$$\sqrt2l$$
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The masses of 200 g and 300 g are attached to the 20 cm and 70 cm marks of a light meter rod, respectively. The moment of inertia of the system about an axis passing through 50 cm mark is

A
0.15 kg m$$^2$$
B
0.036 kg m$$^2$$
C
0.3 kg m$$^2$$
D
Zero
COMEDK Subjects