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7 months ago

Physics Electromagnetic Induction

The current in a coil of self inductance 2.0 H is increasing according to I = 2sin(t2)A. The amount of energy spent during the period when current changes from 0 to 2 A is…………J.

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Raj Pandey

Contributor-Level 9

Given, L = 2H

l = 2 sin (t²)

$u = \int_{0}^{2} L i d i = \frac{L}{2} {[i^{2}]}_{0}^{2} = \frac{L}{2} [4 - 0]$

$u = \frac{2}{2} * 4 = 4 J$

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7 months ago

Physics Class 11th

What are conservative and non conservative forces?

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Aadit Singh Uppal

Contributor-Level 10

Power calculations can also differ based on the nature of forces, which are as follows:

Conservative Forces: Here, work done is path-independent. e.g., gravity, spring force
Non-Conservative Forces: Work depends on the path. e.g., friction

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7 months ago

Physics Class 12th

The total current supplied to the circuit is shown in figure by the 5 V battery is…………….A.

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Raj Pandey

Contributor-Level 9

$\equiv R e q = 2.5 Ω$

$l = \frac{v}{R_{e q}} = \frac{5}{2.5} = 2 A$

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7 months ago

Physics Class 11th

Moment of inertia (M.I) of four bodies, having same mass and radius, and reported as:

I₁ = M.I. of thin circular ring about its diameter

I₂ = M.I. of circular disc about an axis perpendicular to disc and going through the centre,

I₃ = M.I. of solid cylinder about its axis and

I₄ = M.I. of solid sphere about its diameter.

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alok kumar singh

Contributor-Level 10

$l_{1} = \frac{1}{2} m r^{2}$

$\begin{array}{l} l_{2} = \frac{1}{2} m r^{2} \\ l_{3} = \frac{1}{2} m r^{2} \\ l_{4} = \frac{2}{5} m r^{2} \end{array}$

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7 months ago

Physics NEET

What is weightage of Class 11 Physics Chapter 11 Thermodynamics in NEET and JEE Main exams?

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7 months ago

Physics Class 12th

A resistor develops 300 J of thermal energy in 15s, when a current of 2 A is passed through it. If the current increases to 3 A, the energy developed in 10s is…………….J.

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