MCQ
Which among the following has a relative permeability much larger than 1?
- ADiamagnetic materials.
- BFerromagnetic materials.
- CParamagnetic materials.
- DFerrimagnetic materials.
✓
Answer
- Ferromagnetic materials.
Explanation:
The relative permeability of ferromagnetic materials is much larger than 1. Ferromagnetic substances are those, which when placed in a magnetic field are strongly magnetized in the direction of the magnetizing field, i.e., it is strongly attracted by a magnet.
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
Mark the correct options:
The optical path of a monochromatic light is same if it goes through 4.0 cm of glass or 4.5 cm of water. If the refractive index of glass is 1.53, the refractive index of the water is
|
(a) 1.30 |
(b) 1.36 |
(c) 1.42 |
(d) 1.46 |
In an electromagnetic wave, the electric magnetising fields are $\frac{100\text{V}}{\text{m}}$ and $\frac{0.265\text{A}}{\text{m}}$ The maximum energy flow is?
→When light is incident on a doubly refracting crystal, two refracted rays-ordinary ray (O-ray) and extra ordinary ray (E-ray) are produced. Then
|
(a) Both O-ray and E-ray are polarised perpendicular to the plane of incidence |
|
(b) Both O-ray and E-ray are polarised in the plane of incidence |
|
(c) E-ray is polarised perpendicular to the plane of incidence and O-ray in the plane of incidence |
|
(d) E-ray is polarised in the plane of incidence and O-ray perpendicular to the plane of incidence |
Choose the correct option:
Alternating current is flowing in inductance L and resistance R. The frequency of source is $\frac{\omega}{2\pi}$ Which of the following statement in correct:
→From a supply of identical capacitors rated 8 μF, 250 V, the minimum number of capacitors required to form a composite 16 μF, 1000 V capacitor is:
The magnetic field at a distance r from a long wire carrying current i is 0.4 Tesla. The magnetic field at a distance 2r is
|
(a) 0.2 Tesla |
(b) 0.8 Tesla |
(c) 0.1 Tesla |
(d) 1.6 Tesla |
In rear-wheel drive cars, the engine rotates the rear wheels and the front wheels rotate only because the car moves. If such a car accelerates on a horizontal road, the friction:
- On the rear wheels is in the forward direction.
- On the front wheels is in the backward direction.
- On the rear wheels has larger magnitude than the friction on the front wheels.
- On the car is in the backward direction.
The electric field inside a spherical shell of uniform surface charge density is
|
(a) Zero |
|
(b) Constant, less than zero |
|
(c) Directly proportional to the distance from the centre |
|
(d) None of the above |