MCQ
The transformation ratio in the step-up transformer is
  • A
    $1$
  • Greater than one
  • C
    Less than one
  • D
    The ratio greater or less than one depends on the other factors

Answer

Correct option: B.
Greater than one
Transformation ratio $k=\frac{N_s}{N_p}=\frac{V_s}{V_p}$
For step-up transformers, $N_s>N_p$ i.e. $V_s>V_p$, hence $k>1$.

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

A spherical drop of water has radius $1 \mathrm{~mm}$ if surface tension of water is $70 \times 10^{-3} \mathrm{~N} / \mathrm{m}$ difference of pressures between inside and out side of the spherical drop is
If the work function of a metal is ' $\phi$ ' and the frequency of the incident light is ' $v$ ', there is no emission of photoelectron if
Photo-electric effect can be explained by
A gun is aimed at a target in a line of its barrel. The target is released and allowed to fall under gravity at the same instant the gun is fired. The bullet will
A metal sphere is hung by a string fixed to a wall. The sphere is pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements is wrong
Image
The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the resistor is
Two bodies are thrown up at angles of 45 and 60 , respectively, with the horizontal. If both bodies attain same vertical height, then the ratio of velocities with which these are thrown is
In the figure four plate characteristics of a triode at different grid voltage are shown. The difference between successive grid voltage is $1\ V.$ Which curve will have maximum grid voltage and what is its value?
Image
Whose dimensions is $M L^2 T^{-1}$
An ionization chamber with parallel conducting plates as anode and cathode has $5 \times 10^7$ electrons and the same number of singlycharged positive ions per $\mathrm{cm}^3$. The electrons are moving at $0.4 \mathrm{~m} / \mathrm{s}$. The current density from anode to cathode is $4 \mu \mathrm{A} / \mathrm{m}^2$. The velocity of positive ions moving towards cathode is