MCQ
We can reduce eddy currents in the core of transformer
- ABy increasing the number of turns in secondary coil
- ✓By taking laminated core
- CBy making step-down transformer
- DBy using a weak ac at high potential
✓
Answer
Correct option: B.
By taking laminated core
b
Given, Four options
Given, Four options
To find, How we can reduce eddy current in the core of a transformer.
we know, Energy is lossed in transformer due to eddy current, which heated rep the core. Eddy current can be reduced by taking laminated core.
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
The spectral series of the hydrogen spectrum that lies in the ultraviolet region is the
Soap bubble looks coloured due to:
The electric potential (V) inside a uniformly charged. spherical shell depends on distance:
A capacitor of capacitance $C$ is initially charged to a potential difference of $V$ $volt$. Now it is connected to a battery of $2V$ with opposite polarity. The ratio of heat generated to the final energy stored in the capacitor will be
→For a given surface the Gauss's law is stated as $\oint \mathrm{E} . \mathrm{ds}=0.$ From this we can conclude that
→$SI$ unit of the magnetic field is $.......$.
→A thin stiff insulated metal wire is bent into a circular loop with its two ends extending tangentially from the same point of the loop. The wire loop has mass $m$ and radius $r$ and it is in a uniform vertical magnetic field $B_0$, as shown in the figure. Initially, it hangs vertically downwards, because of acceleration due to gravity $g$, on two conducting supports at $P$ and $Q$. When a current $/$ is passed through the loop, the loop turns about the line $P Q$ by an angle $\theta$ given by
→An $e.m.f$. of $12$ $volts$ is induced in a given coil when the current in it changes at the rate of $48$ $amperes/ minute$. The self inductance of the coil is.....$henry$
→A ray of light strikes a plane mirror $M$ at an angle of $45^o $ as shown in the figure. After reflection, the ray passes through a prism of refractive index $1.5$ whose apex angle is $4^o $. The total angle through which the ray is deviated is....$^o$
→Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be