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

11 months ago

Physics Class 12th

Five identical cells each of internal resistance $1 Ω$ and emf 5V are connected in series and in parallel with an external resistance 'R'. For what value of 'R', current in series and parallel combination will remain the same?

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$l_{1} = \frac{25}{5 + R}$

$l_{2} = \frac{5}{R + \frac{1}{5}}$

$\begin{array}{l} ? l_{1} = l_{2} \Rightarrow 4 R = 4 \\ \Rightarrow R = 1 Ω \end{array}$

0 0

New answer posted

11 months ago

Physics Class 12th

Three capacitors C₁ = $2 μ F, C_{2} = 12 μ F$ and C₃ = $12 μ F$ are connected as shown in figure. Find the ratio of the charges on capacitors C₁, C₂ and C₃ respectively:

0 Follower 4 Views

alok kumar singh

Contributor-Level 10

$Q_{1} = C_{1} V = 2 V μ C$

$Q_{2} = Q_{3} = \frac{C_{2} C_{3}}{C_{2} + C_{3}} V = \frac{6 * 12}{6 + 12} V = 4 V μ C$

$Q_{1} : Q_{2} : Q_{3} = 1 : 2 : 2$

0 0

New answer posted

11 months ago

Physics Laws of Motion

The resultant of these forces $\vec{O P}, \vec{O Q}, \vec{Q R}, \vec{O S} a n d \vec{O T}$ is approximately. . . . . . .N

[Take $\sqrt[]{3} = 1.7, \sqrt[]{2} = 1.4 .$ Given $\hat{i} a n d \hat{j}$ unit vectors along x, y axis]

0 Follower 29 Views

Vishal Baghel

Contributor-Level 10

${\vec{F}}_{x} = [10 * \frac{\sqrt[]{3}}{2} + 20 * \frac{1}{2} + \frac{20}{\sqrt[]{2}} - \frac{15}{\sqrt[]{2}} - \frac{15 \sqrt[]{3}}{2}] = 9.25 \hat{i}$

${\vec{F}}_{y} = [15 * \frac{1}{2} + 20 * \frac{\sqrt[]{3}}{2} + 10 * \frac{1}{2} - \frac{15}{\sqrt[]{2}} - \frac{20}{\sqrt[]{2}}] = 5 \hat{j}$

0 0

New answer posted

11 months ago

Physics Class 11th

A copper block of mass 5.0kg is heated to a temperature of $500 ° C$ and is placed on a large ice block. What is the maximum amount of ice that can melt?

[Specific heat of copper : 0.39 J g^-1 ⁰C^-1 and latent heat of fusion of water : 335 J g^-1]

0 Follower 3 Views

Raj Pandey

Contributor-Level 9

Heat Released by block = Heat gain by large Ice block

$\Rightarrow m c Δ T = M_{i c e} L$

5 * 0.39 * 500 = m_ice * 335

$m_{i c e} = \frac{5 * 0.39 * 500}{335}$

= 2.91 kg

0 0

New answer posted

11 months ago

Physics Electromagnetic Waves

If E and H represents the intensity of electric field and magnetizing field respectively, then the unit of E/H will be:

0 Follower 5 Views

Vishal Baghel

Contributor-Level 10

$\frac{E}{H} = \frac{V o l t / m e t r e}{A m p e r e / m e t r e} = \frac{V o l t}{A m p e r e} = o h m$

0 0

New answer posted

11 months ago

Physics Units and Measurement

Match List II with List II

List I List II

(A) R_H(Rydberg constant) (i) kg m^-¹s^-¹

(B) h (Planck

...more

Match List II with List II

List I List II

(A) R_H(Rydberg constant) (i) kg m^-¹s^-¹

(B) h (Planck's constant) (ii) kg m²s^-¹

(C) $μ_{B}$ (Magnetic field energy density) (iii) m^-¹

(D) $η$ (coefficient of viscocity (iv) kg m^-¹s^-²

less

0 Follower 5 Views

alok kumar singh

Contributor-Level 10

R_H : m^-1

h : kgm² s^-1

$μ_{B} : k g m^{- 1} s^{- 2}$

$η : k g m^{- 1} s^{- 1}$

0 0

New answer posted

11 months ago

Physics Oscillations

The variation of displacement with time of a particle executing free simple harmonic moton is shown in the figure. The potential energy U(x) versus time (t) plot of the particle is correctly shown in figure:

0 Follower 10 Views

Vishal Baghel

Contributor-Level 10

Potential Energy is maximum at extreme position

0 0

New answer posted

11 months ago

Physics Class 11th

A mass of 50 kg is placed at the centre of a uniform spherical shell of mass 100kg and radius 50m. If the gravitational potential at a point, 25m from the centre is V kg/m. The value of V is:

0 Follower 3 Views

alok kumar singh

Contributor-Level 10

$V_{A} = - \frac{G M_{1}}{r} - \frac{G M_{2}}{R} = - \frac{50 G}{25} - \frac{100 G}{50} = - 4 G$

0 0

New answer posted

11 months ago

Physics Physics Moving Charges and Magnetism

Two ions of masses 4 amu and 16 amu have charges +2e and +3e respectively. These ions pass through the region of constant perpendicular magnetic field. The kinetic energy of both ions is same. Then:

0 Follower 2 Views

Vishal Baghel

Contributor-Level 10

$R = \frac{\sqrt[]{2 E m}}{B . q}$

$\Rightarrow R * \frac{\sqrt[]{m}}{q}$

$\Rightarrow \frac{R_{1}}{R_{2}} = \frac{\sqrt[]{4}}{2} * \frac{3}{\sqrt[]{16}} = \frac{3}{4}$

$\Rightarrow R_{2} = \frac{4 R_{1}}{3}$

$s i n θ = \frac{d}{R} \Rightarrow θ α \frac{1}{2} \Rightarrow θ_{2} < θ_{1}$

0 0

New answer posted

11 months ago

Physics Physics Motion in Plane

A player kicks a football with an initial speed of 25 ms^-¹ at an angle of 45° from the ground. What are the maximum height and the time taken by the football to reach at the highest point during motion? (Take g = 10 ms^-²)

0 Follower 3 Views

alok kumar singh

Contributor-Level 10

$H_{m a x} = \frac{u^{2} s i n^{2} θ}{2 g} = \frac{{(25 * s i n 45 °)}^{2}}{2 * 10} = 15.625 m$

$T = \frac{u s i n θ}{g} = \frac{25 * s i n 45}{10} = 1.77 s$

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
705k Reviews
1850k 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