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Explain the construction of the transformer.
For the construction of the transformer, you must have two coils having mutual inductance and a laminated steel core. The two coils are insulated from each other and from the steel core. The device...
Write the principle and explain the construction and working of a transformer. Define its efficiency.
Principle: The transformer is based on the principle of electromagnetic induction. The phenomenon of producing an induced emf due to the changes in the magnetic flux associated with a closed circuit...
Distinguish between
(i) Hexagonal and monoclinic unit cells Ans: Hexagonal unit cell: For a hexagonal unit cell $$ \begin{array}{l} a=b \neq c \\ \text { and } \alpha=\beta= \\ y=120^{\circ} \end{array} $$ Monoclinic...
Name the parameters that characterize a unit cell.
Ans: The six parameters that characterize a unit cell are as follows. (i) Its dimensions along the three edges, $a, b$, and $c$. These edges may or may not be equal. (ii) Angles between the edges....
Give the significance of a lattice point.
Ans: The significance of a lattice point is that each lattice point represents one constituent particle of a solid which may be an atom, a molecule (group of atom), or an ion.
A compound is formed by two elements and . The element forms ccp and atoms of M occupy of tetrahedral voids. What is the formula of the compound?
Ans: The ccp lattice is formed by the atoms of the element $\mathrm{N}$. Here, the number of tetrahedral voids generated is equal to twice the number of atoms of the element $\mathrm{N}$. According...
The frequency at which the impedance of the circuit boorens mavimum is
a
b
c
D
Correct option is c $\frac{1}{2 \pi} \sqrt{\frac{1}{L C}-\frac{R^{2}}{L^{2}}}$ Megritude of admittanos $Y=\frac{1}{Z}$ is given by: $$ |\mathrm{Y}|=\frac{\mid \mathrm{H}^{2}...
A compound forms a hexagonal close-packed structure. What is the total number of voids in of it? How many of these are tetrahedral voids?
A compound is formed by two elements $\mathrm{M}$ and $\mathrm{N}$. The element $\mathrm{N}$ forms ccp and atoms of M occupy $1 / 3 r d$ of tetrahedral voids. What is the formula of the compound?
The phase difference between the applied emf and the line current in an anti-resonant circuit at resonance is
A radian
B radian
c radian
D zero
The correct option is D zero We know that phase difference is given by: $$ \phi=\arctan \left(\frac{\left(\mathrm{X}_{\mathrm{L}}-\mathrm{X}_{\mathrm{C}}\right)}{\mathrm{R}}\right) $$ at resonance...
The frequency at which the impedance of the circuit boorens mavimum is
a
b
c
D
Correct option is c $\frac{1}{2 \pi} \sqrt{\frac{1}{L C}-\frac{R^{2}}{L^{2}}}$ Megritude of admittanos $Y=\frac{1}{Z}$ is given by: $$ |\mathrm{Y}|=\frac{\mid \mathrm{H}^{2}...
The resonent froquengy in an anti resonant circuitis:
a
b
c
D
Correct option is a $\frac{1}{2 \pi \sqrt{L C}}$ For rescnance $$ \mathrm{X}_{\mathrm{L}}=\mathrm{X}_{\mathrm{E}} $$ $$ \begin{aligned} \mathrm{kL} &=\frac{1}{\mathrm{wC}} \\ \mathrm{w}...
What is the two dimensional coordination number of a molecule in a square close packed layer?
Ans: In a square close-packed layer, the molecule is in contact with four of its neighbours, Therefore, the two-dimensional coordination number of a molecule in a square close packed layer is $4 .$