MCQ
Core of transformer is made up of
  • Soft iron
  • B
    Steel
  • C
    Iron
  • D
    Alnico

Answer

Correct option: A.
Soft iron

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An aircraft is moving with a velocity of $300 ms ^{-1}$. If all the forces acting on it are balanced, then
There is a simple pendulum hanging from the ceiling of a lift. When the lift is stand still, the time period of the pendulum is $T$. If the resultant acceleration becomes $g / 4$, then the new time period of the pendulum is
The relationship between the force $F$ and position $x$ of a body is as shown in figure. The work done in displacing the body from $x=1 \mathrm{~m}$ to $x=5 m$ will be

Image

A monoatomic gas $(\gamma=5 / 3)$ is suddenly compressed to $\frac{1}{8}$ of its original volume adiabatically, then the pressure of the gas will change to
The adjacent graph shows the extension $(\Delta l)$ of a wire of length $1 m$ suspended from the top of a roof at one end with a load $W$ connected to the other end. If the cross sectional area of the wire is $10^{-6} m ^2$, calculate the young's modulus of the material of the wire

Image

According to Joule's law, if the potential difference across a conductor having a material of specific resistance remains constant, then the heat produced in the conductor is directly proportional to
An ice berg of density $900\ Kg / m$ is floating in water of density $1000\ Kg / m$. The percentage of volume of ice-cube outside the water is
The focal lengths of the objective and eye-piece of a telescope are respectively $100 \mathrm{~cm}$ and $2 \mathrm{~cm}$. The moon subtends an angle of $0.5^{\circ}$ at the eye. If it is looked through the telescope, the angle subtended by the moon's image will be
The $v-t$ graph of a moving object is given in figure. The maximum acceleration is Image
A bob of mass $10 kg$ is attached to wire $0.3 m$ long. Its breaking stress is $4.8 \times 10^{ N } N / m$. The area of cross section of the wire is 10 . m. The maximum angular velocity with which it can be rotated in a horizontal circle