Physics

$\lambda >h\Rightarrow \lambda >400m$

$Q_1=C_{1}V=2V\mu C$

$Q_2=Q_3=\frac{C_2{C}_3}{C_2+C_3}V=\frac{6*12}{6+12}V=4V\mu C$

$Q_1:Q_2:Q_3=1:2:2$

Let us consider an elementary ring of radius r and thickness dr in which current is flowing.

So, No. of turns in this elementary ring

$dN=\left(\frac{N}{b-a}\right)dr$

$\therefore {\left(dB\right)}_{atcentre}=\frac{{\mu }_{0}ldN}{2r}$

$B=\frac{{\mu }_{0}lN}{2\left(b-a\right)}\mathcal{l}n\frac{b}{a}$

Diode, in forward biased condition only, will allow current to flow through it.

Pot. different across resistor is

$\Delta V=\left(10sin\omega t-3\right)volt$  

But in reverse biased condition of diode,

$\Delta V=0$ (across diode)

Using F = MA = $m\frac{V}{T}$ $\frac{}{}$

m = FTV¹

Load of mass will be equally distributed among the four colours so force on each columns will be 125 * 10³ N.

Cross section area of the column = $\pi \left[{\left(1\right)}^2-{\left(0.5\right)}^2\right]=2.355m^2$

Using young's modulus : $\epsilon =\frac{\sigma }{Y}=\frac{F}{AY}=\frac{125*10^3}{2.355*2*10^{11}}=2.65*10^{-7}$  

V = 10 $\left(1?e^{?t/RC}\right)$ ${}^{}$

2 = 20 $\left(1?e^{?t/RC}\right)$ ${}^{}$

$\frac{1}{10}=1?e^{?t/RC}$

$e^{t/RC}=\frac{10}{9}$

$\frac{t}{RC}=ln\left(\frac{10}{9}\right)=0.105$

$C=\frac{t}{R*0.105}=\frac{10^{?6}}{10*0.105}=0.95?F$

As observer is at O So height of water observed by observer

$\Rightarrow \frac{H}{{\mu }_{\omega }}=\frac{H}{\left(4/3\right)}=\frac{3H}{4}$

given diagram (17.5 H) is height of observer

$So\frac{3H}{4}=17.5-H$

$\frac{7H}{4}=17.5$

7H = 70

H = 10

It's the energy that is needed for a change of state to transition from one substance or physical state to another. Remember that the main condition for latent heat is that there is no temperature change when the energy is absorbed or released. 

You will be seeing these temperature plateaus appearing on the heating curve at the main melting and boiling points. The reason for that is the energy reaches latent heat. And we know that latent heat is the energy that lets phase transitions occur without increasing the temperature.