Tags Physics Ncert Solutions Class 12th

Physics Ncert Solutions Class 12th

Get insights from 1.2k questions on Physics Ncert Solutions Class 12th, answered by students, alumni, and experts. You may also ask and answer any question you like about Physics Ncert Solutions Class 12th

Follow Ask Question

1.2k

Questions

Discussions

Active Users

Followers

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

An amplitude modulated wave is represented by the expression vₘ = 5(1 + 0.6cos 6280t)sin(211 * 10⁴t) volts. The minimum and maximum amplitudes modulated wave are respectively

0 Follower 4 Views

alok kumar singh

Contributor-Level 10

From Given equation
µ = 0.6
A? = µA?
(A? - A? )/2 = A? = 5
(A? + A? )/2 =?
A? - A? = 3
From equation (1)+ (2)
A? = 8
From equation (1)- (2)
A? = 2

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

Identify the correct output signal Y in the given combination of gates (as shown) for the given inputs A and B.

0 Follower 11 Views

Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

Two Zener diodes (A and B) having breakdown voltages of 6 V and 4 V respectively, are connected as shown in the circuit below. The output voltage V? variation with input voltage linearly increasing with time, is given by: (V_input = 0 V at t = 0) (figures are qualitative)

0 Follower 11 Views

Vishal Baghel

Contributor-Level 10

Till input voltage reaches 4 V. No zener is in breakdown region. So V? = V? then now hen V? changes between 4 V to 6 V one zener with 4 V will breakdown are P.D. across this zener will become constant and remaining potential will drop acro resistance in series with 4 V zener.

Now current in circuit increases Abruptly and source must have an internal resistance due to which. Some potential will get drop across the source also so correct graph between V? and t will be
We have to assume some resistance in series with source.

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

Effective capacitance of parallel combination of two capacitors $C_{1}$ $_{}$ and $_{}$ $C_{2}$ is $10 μ F$ . When these capacitor are individually connected to a voltage source $1 V$ of $1 V$ , the energy stored in the capacitor $C_{2}$ $_{}$ is 4 times that of $_{}$ $C_{1}$ . If these capacitors are connected in series, their effective capacitance will be

0 Follower 2 Views

Raj Pandey

Contributor-Level 9

Given: $C_{1} + C_{2} = 10 μ F$

$\begin{array}{r} 4 (\frac{1}{2} C_{1} V^{2}) = \frac{1}{2} C_{2} V^{2} \\ \Rightarrow 4 C_{1} = C_{2} \end{array}$

From equation (i) and (ii)

$\begin{array}{r} C_{1} = 2 μ F \\ C_{2} = 8 μ F \end{array}$ If they are in series

$C_{eq} = \frac{C_{1} C_{2}}{C_{1} + C_{2}} = 1.6 μ F$

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

Which of the following given a reversible operation?

0 Follower 17 Views

Vishal Baghel

Contributor-Level 10

A logic GATE is reversible if we can recover input data fro the output eg. NOT gate.

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

In finding the electric field using Gauss law the formula $| \overset{?}{E} | = \frac{q_{enc}}{ε_{0} | A |}$ $\frac{_{}}{_{}}$ is applicable. In the formula $ε_{0}$ $_{}$ is permittivity of free space, $A$ is the area of Gaussain surface and $q_{enc}$ $_{}$ is charge enclosed by the Gaussian surface. This equation can be used in which of the following situation? Only when the Gaussian surface is an

0 Follower 1 View

Raj Pandey

Contributor-Level 9

Magnitude of electric field is constant & the surface is equipotential.

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

A 25 m long antenna is mounted on an antenna tower. The height of the antenna tower is 75m. The wavelength (in meter) of the signal transmitted by this antenna would be

0 Follower 2 Views

Raj Pandey

Contributor-Level 9

Kindly consider the following Image

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

Find out the surface charge density at the intersection of point x = 3 m plane and x-axis, in the region of uniform line charge of 8 nC/m lying along the z-axis in free space.

0 Follower 8 Views

alok kumar singh

Contributor-Level 10

According to Question, we can write
E = λ/ (2πε? r) ⇒ σ = ε? E = λ/ (2πr)
⇒ σ = 8*10? / (2*3.14*3) = 0.424 nCm? ²

0 0

New answer posted

5 months ago

Physics Ncert Solutions Class 12th Class 12th

Two identical antennas on identical towers are separated from each other by a distance of 45 km. What should be the minimum height of receiving antenna to receive the signals in line of sight? (Assume radius of earth is 6400 km)

0 Follower 3 Views