Light is invisible until it hits an object. It can only be visible to us whenever it get scattered or bounced off the dust particles in the intervening medium. We can see the source of light like stars at night as they are too dim to light up much but that light does hit our eyes and therefore we see the light. The above discussion on visibility of light is only confined to the electromagnetic radiation of wavelength from 400 nm to 700 nm which is called visible light, as these electromagnetic radiations gives the sensation of sight.
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Numerical Problems Based on Ampere’s Circuital Law for Class 12 Physics
Last modified on:6 days agoReading Time:15Minutes Numerical Problems on Ampere’s Circuital Law Class 12 Physics · Moving Charges and Magnetism SQ Ampere’s Law and Solenoids Practice Set Apply $\oint \vec{B} \cdot d\vec{l} = \mu_0 I_{enclosed}$ and solenoid/toroid formulas Ch 4 · Moving Charges and Magnetism 1 A long solenoid consists of 20 turns per cm. What… Read more
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Numerical Problems Based on Current Carrying Circular Loops for Class 12 Physics
Last modified on:6 days agoReading Time:11Minutes Numerical Problems on Current Carrying Circular Loops Class 12 Physics · Moving Charges and Magnetism SQ Magnetic Field of Circular Loops Practice Set Apply $B = \frac{\mu_0 N I}{2R}$ and superposition principle Ch 4 · Moving Charges and Magnetism 1 Consider a tightly wound 100 turn coil of radius 10… Read more
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Numerical Problems Based on Applications of Biot-Savart Law for Class 12 Physics
Last modified on:6 days agoReading Time:11Minutes Numerical Problems on Applications of Biot-Savart Law Class 12 Physics · Moving Charges and Magnetism SQ Magnetic Field due to a Straight Wire Practice Set Apply $B = \frac{\mu_0 I}{2\pi r}$ for long straight conductors Ch 4 · Moving Charges and Magnetism 1 A straight wire carries a current of… Read more
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Numerical Problems Based on Biot-Savart Law for Class 12 Physics
Last modified on:6 days agoReading Time:9Minutes Numerical Problems on Biot-Savart Law Class 12 Physics · Moving Charges and Magnetism SQ Biot-Savart Law Practice Set Apply $d\vec{B} = \frac{\mu_0}{4\pi} \frac{I d\vec{l} \times \hat{r}}{r^2}$ Ch 4 · Moving Charges and Magnetism 1 A wire placed along east-west direction carries a current of 10 A from west to east… Read more
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Numerical Problems Based on Kirchhoff’s Laws for Class 12 Physics
Last modified on:1 week agoReading Time:10Minutes Numerical Problems on Kirchhoff’s Laws Class 12 Physics · Current Electricity SQ Kirchhoff’s Circuit Laws Practice Set Apply KCL $\sum I = 0$ and KVL $\sum \Delta V = 0$ Ch 3 · Current Electricity 1 Apply Kirchhoff’s rules to the loops PRSP and PRQP to write the expressions for… Read more
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Numerical Problems Based on Heating Effects of Electric Current for Class 12 Physics
Last modified on:1 week agoReading Time:24Minutes Numerical Problems on Heating Effects of Electric Current Class 12 Physics · Current Electricity SQ Electric Power and Heating Effects Practice Set Apply $H = I^2Rt$, $P = VI$, and $P = \frac{V^2}{R}$ Ch 3 · Current Electricity 1 Calculate the current flowing through a heater rated at 2 kW… Read more
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Numerical Problems Based on Combination of Cells for Class 12 Physics
Last modified on:1 week agoReading Time:16Minutes Numerical Problems on Combination of Cells Class 12 Physics · Current Electricity SQ Grouping of Cells Practice Set Apply Series, Parallel, and Mixed Grouping Formulas Ch 3 · Current Electricity 1 Three identical cells, each of emf 2 V and internal resistance $0.2 \Omega$ are connected in series to an… Read more
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Numerical Problems Based on EMF and Internal Resistance for Class 12 Physics
Last modified on:1 week agoReading Time:19Minutes Numerical Problems on EMF and Internal Resistance Class 12 Physics · Current Electricity SQ EMF, Terminal Voltage, and Grouping of Cells Practice Set Apply $V = E – Ir$, charging $V = E + Ir$, and Ohm’s Law Ch 3 · Current Electricity 1 A cell of emf 4 V… Read more
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Numerical Problems Based on Combination of Resistance for Class 12 Physics
Last modified on:1 week agoReading Time:24Minutes Numerical Problems on Combination of Resistances Class 12 Physics · Current Electricity SQ Series and Parallel Combinations Practice Set Apply $R_s = R_1 + R_2 + \dots$ and $\frac{1}{R_p} = \frac{1}{R_1} + \frac{1}{R_2} + \dots$ Ch 3 · Current Electricity 1 Given the resistances of $1 \Omega, 2 \Omega$ and… Read more
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Numerical Problems Based on Temperature Variation of Resistance for Class 12 Physics
Last modified on:1 week agoReading Time:12Minutes Numerical Problems on Temperature Variation of Resistance Class 12 Physics · Current Electricity SQ Temperature Coefficient Practice Set Apply $R_t = R_0(1 + \alpha \Delta t)$ Ch 3 · Current Electricity 1 A platinum wire has a resistance of $10 \Omega$ at $0^{\circ}\text{C}$ and of $20 \Omega$ at $273^{\circ}\text{C}$. Find… Read more
