Physics NCERT Exemplar Solutions Class 11th Chapter Ten

For a transverse wave traveling along a straight line, the distance between two peaks (crests) is $\mathrm{C}\to \mathrm{I}$ $$ , while the distance between one crest and one trough is $$ $\mathrm{D}\to \mathrm{I}\mathrm{V}$ . The possible wavelengths (in $\mathrm{A}\to \mathrm{I}\mathrm{V};\mathrm{}\mathrm{B}\to \mathrm{I}$ $\mathrm{}$ ) of the waves are:

A small bar magnet is moved through a coil at constant speed from one end to the other. Which of the following series of observations will be seen on the galvanometer G attached across the coil?

Three positions shown describe:

(a) the magnet's entry

(b) magnet is completely inside and

(c) magnet's exit

Match the $C_p/C_V$ ${}_{}{}_{}$ ratio for ideal gases with different type of molecules:

Match the correct option?

Choose the correct option relating wavelengths of different parts of electromagnetic wave spectrum:

A two point charges $4q$ $$ and $$ $-q$ are fixed on the $$ $x$ -axis at $x=-\frac{d}{2}$ $\frac{}{}$ and $x=\frac{d}{2}$ $\frac{}{}$ , respectively. If a third point charge ' $q$ $$ ' is taken from the origin to $x=d$ $$ along the semicircle as shown in the figure, the energy of the charge will:

A small bar magnet placed with its axis at ${30}^{?}$ ${}^{}$ with an external field of $0.06\mathrm{T}$ $$ experiences a torque of $$ $0.018\mathrm{N}\mathrm{m}$ . The minimum work required to rotate it from its stable to unstable equilibrium position is:

A beam of plane polarized light of large cross-sectional area and uniform intensity of $3.3{\mathrm{W}\mathrm{m}}^{-2}$ ${}^{}$ falls normally on a polarizer (cross sectional area $3*{10}^{-4}{\mathrm{m}}^2$ ${}^{}{}^{}$ ) which rotates about its axis with an angular speed of $31.4\mathrm{r}\mathrm{a}\mathrm{d}/\mathrm{s}$ $$ . The energy of light passing through the polariser per revolution, is close to:

Take the breakdown voltage of the zener diode used in the given circuit as $6\mathrm{V}$ $$ . For the input voltage shown in figure below, the time variation of the output voltage is: (Graphs drawn are schematic and not to scale)

The specific heat of water $=4200\mathrm{J}{\mathrm{k}\mathrm{g}}^{-1}{\mathrm{K}}^{-1}$ ${}^{}{}^{}$ and the latent heat of ice $=3.4*{10}^5\mathrm{J}{\mathrm{k}\mathrm{g}}^{-1}$ ${}^{}{}^{}$ . 100 grams of ice at $0^{?}\mathrm{C}$ ${}^{}$ is placed in $200\mathrm{g}$ $$ of water at ${25}^{?}\mathrm{C}$ ${}^{}$ . The amount of ice that will melt as the temperature of water reaches $0^{?}\mathrm{C}$ ${}^{}$ is close to (in grams):

A wire $A$ $$ , bent in the shape of an arc of a circle, carrying a current of $$ $2\mathrm{A}$ and having radius $2\mathrm{c}\mathrm{m}$ $$ and another wire $B$ $$ , also bent in the shape of arc of a circle, carrying a current of $3\mathrm{A}$ $$ and having radius of $4\mathrm{c}\mathrm{m}$ $$ , are placed as shown in the figure. The ratio of the magnetic fields due to the wires $A$ $$ and B$$ at the common centre 0 is: