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 2021
MCQ (Single Correct Answer)
+1
-0

A bar magnet is oscillating in the earth's magnetic field with a period T. What happens to its period and motion, if its mass is quadrupled?

A
Motion remains simple harmonic with time period 4T.
B
Motion remains simple harmonic with time period nearly constant.
C
Motion remains simple harmonic and time period becomes T/2.
D
Motion remains simple harmonic with time period 2T.
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The relative permeability of iron is 6000. Its magnetic susceptibility is

A
5999
B
6001
C
6000 $$\times$$ 10$$^{-7}$$
D
6000 $$\times$$ 10$$^{7}$$
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The intensity of magnetic field due to an isolated pole of strength $$m_p$$ at a point distant $$r$$ from it will be

A
$$m_p/r^2$$
B
$$m_p r^2$$
C
$$r^2/m_p$$
D
$$m_p/r$$
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The angle which the total magnetic field of earth makes with the surface of the earth is called

A
declination
B
magnetic meridian
C
geographic meridian
D
inclination
COMEDK Subjects