Tags Maths NCERT Exemplar Solutions Class 11th Chapter Eleven

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven

Get insights from 151 questions on Maths NCERT Exemplar Solutions Class 11th Chapter Eleven, answered by students, alumni, and experts. You may also ask and answer any question you like about Maths NCERT Exemplar Solutions Class 11th Chapter Eleven

Follow Ask Question

151

Questions

Discussions

Active Users

Followers

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Physics Electromagnetic Waves

An electromagnetic wave of frequency 5 GHz, is travelling in a medium whose relative electric permittivity and relative magnetic permeability both are 2. Its velocity in the this medium is_____* 10⁷ m/s.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

$v = \frac{1}{\sqrt[]{ε μ}} = \frac{1}{\sqrt[]{2 ε_{0} . 2 μ_{0}}} = \frac{1}{2 \sqrt[]{ε_{0} μ_{0}}} = \frac{c}{2} = 15 * 1 0^{7} m / s .$

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Class 12th

A common transistor ratio set requires 12V (D.C) for its operation. The D.C source is constructed by using a transformer and a rectifier circuit, which are operated at 220V (A.C) on standard domestic A.C, supply. The number of turns of secondary coil are 24, then the number of turns of primary are___________.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

$\frac{N_{p}}{N_{s}} = \frac{V_{p}}{V_{s}} \Rightarrow N_{p} = \frac{V_{p}}{V_{s}} * N_{s} = \frac{220}{12} * 24 = 440$

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Physics Wave Optics

An unpolarized light beam is incident on the polarizes of a polarization experiment and the intensity of light beam emerging from the analyzer is measured as 100 Lumens. Now, if the analyzer is rotated around the horizontal axis (direction of light) by 30° in clockwise direction, the intensity of emerging light will be________ Lumens.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

$l = l_{0} c o s^{2} θ = 100 * c o s^{2} (30 °) = 75 L u m e n s$

Note : As the incident light is unpolarized, intensity of emerging light does not depend on the polarization axis of polarizer.

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Work, Energy and Power

An inclined plane in bent in such a way that the vertical cross-section is given by y $= \frac{x^{2}}{4}$ where y is in vertical and x in horizontal direction. If the upper surface of this curved plane is rough with coefficient of friction $μ$ = 0.5, the maximum height in cm at with a stationary block with not skip downward is ____________cm.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

If the block does not slide,

mg sin $θ \leq μ m g c o s θ$

$\Rightarrow t a n θ \leq μ \Rightarrow \frac{d y}{d x} \leq μ \Rightarrow \frac{x}{2} \leq 0.5 \Rightarrow x \leq 1 m .$

Thus, $y \leq \frac{1^{2}}{4} = 0.25 m = 25 c m .$

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Class 11th

A ball with a speed of 9m/s collides with another identical ball at rest. After the collision the direction of each ball makes an angle 30° with the original direction. The ratio of velocities of the balls after collision is x : y, where x is_________.

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

Using conversation of momentum in direction perpendicular to the original direction of motion,

mv₁ sin 30° = mv₂ sin 30°

$\Rightarrow \frac{v_{1}}{v_{2}} = 1$

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Class 12th

A resonance circuit having inductance and resistance 2 * 10^-4 H and 6.28 $Ω$ respectively oscillates at 10 MHz frequency. The value of quality factor of this resonator is__________.

[p = 3.14]

0 Follower 2 Views

alok kumar singh

Contributor-Level 10

Quality factor = $\frac{ω L}{R} = \frac{2 * 3.14 * 10 * 1 0^{6} * 2 * 1 0^{- 4}}{6.28} = 2000$

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Class 11th

The coefficient of static friction between a wooden block of mass 0.5kg and a vertical rough wall is 0.2. The magnitude of horizontal force that should be applied on the block to keep it adhere to the wall be__________ N.

0 Follower 3 Views

alok kumar singh

Contributor-Level 10

f = W = 0.5 * 10 = 5 N

N = F

For block not to slide,

$f \leq μ N$

$\begin{array}{l} \Rightarrow 5 \leq 0.2 F \\ \Rightarrow F \geq 25 N \end{array}$

0 0

New answer posted

a month ago

Maths NCERT Exemplar Solutions Class 11th Chapter Eleven Physics Mechanical Properties of Fluids

A hydraulic press can lift 100kg when a mass 'm' is place on the smaller piston. It can lift_______ kg when the diameter of the large piston in increases by 4 times and that of the smaller piston is decreased by 4 times keeping the same mass 'm' on the smaller piston.

0 Follower 2 Views