MCQ
Magnetic permeability is maximum for
- ADiamagnetic substance
- BParamagnetic substance
- ✓Ferromagnetic substance
- DAll of these
✓
Answer
Correct option: C.
Ferromagnetic substance
Ferromagnetic substance
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A constant current of 2.8A exists in a resistor. The rms current is:
The surface shown in the figure does not represent:
A student is jogging on a straight path with the speed $5.4 \,km$ per hour. Perpendicular to the path is kept a pipe with its opening $8 \,m$ from the road (see figure). Diameter of the pipe is $0.45 \,m$. At the other end of the pipe is a speaker emitting sound of $1280 \,Hz$ towards the opening of the pipes. As the student passes in front of the pipe, she hears the speaker sound for $T$ seconds. $T$ is in the range (Take, speed of sound $=320 \,m / s$ )
→The resistance of a conductor increases with
Current I is flowing in a wire of infinite length. Magnetic field is B at a perpendicular distance r from the wire. The correct relation is:
A boat is moving due east in a region where the earth's magnetic field is $5.0 \times 10^{-5} NA ^{-1} m^{-1}$ due north and horizontal. The boat carries a vertical aerial $2 m$ long. If the speed of the boat is $1.50 ms^{-1}$, the magnitude of the induced emf in the wire of aerial is:
→For an amplitude modulated wave the minimum amplitude is $3\,V$, while the modulation index is $60 \%$. The maximum amplitude of the modulated wave is $......\,V$
→A silicon diode has a forward voltage drop of $1.2\, V$ for a forward $DC$ current of $100\, mA$. It has a reverse current of $1\times10^{-6}\, A$ for a reverse voltage of $10\, V$. The bulk and reverse resistances of diode are
→The capacity of a condenser is $4 \times {10^{ - 6}}$ farad and its potential is $100\,\,volts$. The energy released on discharging it fully will be.......$Joule$
→A antenna current of an $AM$ broadcast transmitter modulated by $50\%$ is $11\, A$. The carrier current is.........$A$
→