Question
By explaining magnetic field lines, write their characteristics.
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Answer
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Use Moseley's law with b = 1 to find the frequency of the $\text{K}_\alpha$ X-ray of La(Z = 57) if the frequency of the $\text{K}_\alpha$ X-ray of Cu(Z = 29) is known to be $1.88 \times 10^{18}Hz.$
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An infinite ladder is constructed with $1\Omega$ and $2\Omega$ resistors, as shown in the figure. (a) Find the effective resistance between the points A and B. (b) Find the current that passes through the $2\Omega$ resistor nearest to the battery.
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$i.$ An ac source generating a voltage $V = V _0 \sin \omega t$ is connected to a capacitor of capacitance $C$ . Find the expression of the current I flowing through it. Plot a graph of $V$ and $I$ versus $\omega t$ to show that the current is $\frac{\pi}{2}$ ahead of the voltage.
$ii.$ A resistor of $200 \Omega$ and a capacitor of $15 \mu F$ are connected in series to a $220 V, 50 \ Hz$ ac source. Calculate the current in the circuit and the rms voltage across the resistor and the capacitor. Why the algebraic sum of these voltages is more than the source voltage?
→$ii.$ A resistor of $200 \Omega$ and a capacitor of $15 \mu F$ are connected in series to a $220 V, 50 \ Hz$ ac source. Calculate the current in the circuit and the rms voltage across the resistor and the capacitor. Why the algebraic sum of these voltages is more than the source voltage?
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Consider the D–T reaction (deuterium–tritium fusion)
$^2_1\text{H}+^3_1\text{H}\rightarrow^4_2\text{He}+\text{n} $
$\text{m}(^3_1\text{H})=3.016049\text{ u}$
→$^2_1\text{H}+^3_1\text{H}\rightarrow^4_2\text{He}+\text{n} $
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$\text{m}(^3_1\text{H})=3.016049\text{ u}$
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