Tags Physics

Physics

Get insights from 5.6k questions on Physics, answered by students, alumni, and experts. You may also ask and answer any question you like about Physics

Follow Ask Question

5.6k

Questions

Discussions

Active Users

Followers

New answer posted

5 months ago

Physics Electromagnetic Induction

An aeroplane, with its wings spread 10m, is flying at a speed of 180 km/h in a horizontal direction. The total intensity of earth's field at that part is 2.5 * 10^-⁴Wb/m² and the angle of dip is 60°. The emf induced between the tips of the plane wings will be………….

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

Bv = B sin 60°

$B_{v} = 2.5 * 1 0^{- 4} * \frac{\sqrt[]{3}}{2}$

$E m f = B_{v} * v * l = 2.5 * 1 0^{- 4} * \frac{\sqrt[]{3}}{2} * 180 * \frac{5}{18} * 1 = 108.25 * 1 0^{- 3} v o l t s$

0 0

New answer posted

5 months ago

Physics Thermodynamics

The internal energy (U), pressure (P) and volume (V) of an ideal gas are related as U = 3PV + 4. The gas is:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

U = 3PV + 4

$\Rightarrow n C_{v} T = 3 P V + 4$

$\Rightarrow n * \frac{f R T}{2} = 3 P V + 4$

$\Rightarrow f = 6 + \frac{8}{P V}$

$\Rightarrow f > 6 \Rightarrow p o l y a t o m i c$

0 0

New answer posted

5 months ago

Physics Physics Alternating Current

In a series LCR resonant circuit, the quality factor is measured as 100. If the inductance is increased by two fold and resistance is decreased by two fold, then the quality factor after this change will be--------.

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

As we know that Q = $\frac{ω L}{R}$

$\Rightarrow \frac{Q'}{Q} = \frac{L'}{R'} * \frac{R}{L} = (\frac{L'}{L}) * (\frac{R}{R'}) = 2 * 2 \Rightarrow Q' = 4 Q = 4 * 100 = 400$

0 0

New answer posted

5 months ago

Physics Physics Electrostatic Potential and Capacitance

If 'C' and 'V' represent capacity and voltage respectively then what are the dimensions of $λ$ where C/V = $λ$

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$λ = \frac{c}{v} = \frac{Q^{3}}{W^{2}} = \frac{I^{3} T^{3}}{M^{2} L^{4} T^{- 4}} \Rightarrow [λ] = [M^{- 2} L^{- 4} T^{7} l^{3}]$

0 0

New answer posted

5 months ago

Physics Physics Motion in Straight Line

A scooter accelerates from rest for time t₁ at constant rate a₁ and then retards at constant rate a₂ for time t₂ and comes to rest. The correct value of $\frac{t_{1}}{t_{2}}$ will be:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$t a n α = \frac{v_{m a x}}{t_{1}} = a_{1}$

$t a n β = \frac{v_{m a x}}{t_{2}} = a_{2}$

^{$\Rightarrow \frac{a_{1}}{a_{2}} = \frac{t_{2}}{t_{1}} \Rightarrow \frac{t_{1}}{t_{2}} = \frac{a_{2}}{a_{1}}$}

0 0

New answer posted

5 months ago

Physics Class 11th

As shown in the figure, a block of mass $\sqrt[]{3} k g$ is kept on a horizontal rough surface of coefficient of friction $\frac{1}{3 \sqrt[]{3}} .$ The critical force to be applied on the vertical surface as shown at an angle 60° with horizontal such that it does not move, will be 3x. The value of x will be-------------.

[g = 10m/s² ; sin 60° = $\frac{\sqrt[]{3}}{2};$ cos60° = $\frac{1}{2}]$

0 Follower 4 Views

Payal Gupta

Contributor-Level 10

N = mg + F sin 60°

$f_{l i m} = F c o s 60 ° \Rightarrow μ N = F c o s 60 °$

$μ m g = F [c o s 60 ° - μ s i n 60 °]$

$F = \frac{μ m g}{c o s 60 ° - μ s i n 60 °} = \frac{\frac{1}{3 \sqrt[]{3}} * \sqrt[]{3} * 10}{\frac{1}{2} - \frac{1}{3 \sqrt[]{3}} * \frac{\sqrt[]{3}}{2}} = \frac{10 / 3}{\frac{1}{2} - \frac{1}{6}} = \frac{10 / 3}{1 / 3} = 10 N = 3 * (\frac{10}{3}) N$

0 0

New answer posted

5 months ago

Physics Physics Oscillations

A particle executes S.H.M., the graph of velocity as a function of displacement is:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$v = ω \sqrt[]{A^{2} - x^{2}} \Rightarrow \frac{v^{2}}{A^{2} ω^{2}} + \frac{x^{2}}{A^{2}} = 1$ Path is ellipse.

0 0

New answer posted

5 months ago

Physics Class 11th

A boy pushes a box of mass 2kg with a force $\vec{F} = (20 \hat{i} + 10 \hat{j}) N$ on a frictionless surface. If the box was initially at rest, then-------------m is displacement along the x – axis after 10s.

0 Follower 3 Views

Payal Gupta

Contributor-Level 10

$a_{x} = \frac{F_{x}}{m} = \frac{20}{2} = 10 m / s^{2}$

$S_{x} = \frac{1}{2} a_{x} t^{2} = \frac{1}{2} * 10 * 1 0^{2}$

0 0

New answer posted

5 months ago

Physics Class 12th

The maximum and minimum amplitude of an amplitude modulated wave is 16V and 8V respectively. The modulation index for this amplitude wave x * 10^-2. The value of x is----------.

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

Modulation Index $(μ) = \frac{A_{m a x} - A_{m i n}}{A_{m a x} + A_{m i n}} = \frac{16 - 8}{16 + 8} = \frac{1}{3} = 0.33 = 33 * 1 0^{- 2}$

0 0

New answer posted

5 months ago

Physics Laws of Motion

Two masses A and B, each of mass M are fixed together by a massless spring. A force acts on the mass B as shown in figure. If the mass A starts moving away from mass B with acceleration 'a', then the acceleration of mass B will be:

0 Follower 4 Views

Vishal Baghel

Contributor-Level 10

Let the spring is in extension state and $a_{B} > a_{A}, {\vec{a}}_{A B} = - a_{A} \hat{i} - (- a_{B} \hat{i}) = (- a_{A} + a_{B}) \hat{i}$ $_{}_{}_{}_{}_{}_{}_{}$

Hence we can say that block moves away from block B in the frame of B

F – kx = MaB . (1)

kx = Ma. (2)

$\Rightarrow a_{B} = \frac{F}{M} - a$

0 0

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

66k Colleges
1.2k Exams
681k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

Physics

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience