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 current is necessary to produce … Read more
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 cm, carrying a current of … Read more
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 3 A. Calculate the magnitude … Read more
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 direction. Determine the magnetic field … Read more
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 the currents $I_1, I_2$ and … Read more
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 when connected to a 300 … Read more
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 external resistor of $7.4 \Omega$. … Read more
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 and internal resistance $1 \Omega$ … Read more
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 $3 \Omega$. How will you … Read more
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 its temperature coefficient of resistance. … Read more
Numerical Problems on Mobility of Charge Carriers Class 12 Physics · Current Electricity SQ Mobility and Conductivity Practice Set Apply $\mu = \frac{v_d}{E}$ and $\sigma = ne\mu$ Ch 3 · Current Electricity 1 A potential difference of 4.5 V is applied across a conductor of length 0.1 m. If the drift velocity of electrons is … Read more
Numerical Problems on Drift Velocity and Current Class 12 Physics · Current Electricity SQ Drift Velocity and Electric Current Practice Set Apply $I = nAev_d$ and relation with current density Ch 3 · Current Electricity 1 The free electrons of a copper wire of cross-sectional area $10^{-6}\text{ m}^2$ acquire a drift velocity of $10^{-4}\text{ m/s}$ … Read more
Numerical Problems on Current Electricity Class 12 Physics · Current Electricity SQ Ohm’s Law, Resistance & Resistivity Practice Set Apply $V = IR$, $R = \rho L/A$, Current Density and Carbon Resistor Colour Codes Ch 3 · Current Electricity 1 A voltage of 30 V is applied across a colour coded carbon resistor with first, … Read more
Electric Current The physics of charges at rest is called electrostatics or static electricity. We shall now study the motion or dynamics of charges. As the term current implies some sort of motion, so the motion of electric charges constitutes an electric current. Understanding Electric current If two bodies charged to different potentials are connected … Read more
Electric flux The term flux implies some kind of flow. Flux is the property of any vector field. The electric flux is a property of electric field. The electric flux through a given area held inside an electric field is the measure of the total number of electric lines of force passing normally through that … Read more
Numerical Problems on Gauss’s Law Applications Class 12 Physics · Electric Charges and Fields SQ Electric Field of Continuous Charge Distributions Apply Gauss’s Law formulas for line charges and infinite plates Ch 1 · Electrostatics 1 An infinite line charge produces a field of $9 \times 10^4\text{ NC}^{-1}$ at a distance of $4\text{ cm}$. Calculate … Read more
Numerical Problems Based on Energy in Capacitors for Class 12 Physics Q.1. A battery of 10 V is connected to a capacitor of capacity 0.1 F. The battery is now removed and this capacitor is connected to a second uncharged capacitor. If the charge distributes equally on these two capacitors, find the total energy stored … Read more
Numerical Problems Based on Grouping of Capacitors for Class 12 Physics Q.1. Two capacitors have a capacitance of 5μF when connected in parallel and 1.2 μF when connected in series. Calculate their capacitances. (Ans. 2 μF and 3 μF) Q.2. Calculate the charge supplied by the battery in the arrangement shown in Fig. (Ans. 110 … Read more
Numerical Problems Based on Capacitance of Capacitors for Class 12 Physics Q.1. Two metallic conductors have net charges of + 70 pC and – 70 pC, which result in a potential difference of 20 V between them. What is the capacitance of the system? (Ans. 3.5 pF) Q.2. A spherical capacitor has an inner sphere … Read more
Numerical Problems Based on Capacitance of Spherical Conductors for Class 12 Physics Q.1. Eight identical spherical drops, each carrying a charge 1 nC are at a potential of 900 V each. All these drops combine together to form a single large drop. Calculate the potential of this large drop. (Assume no wastage of any kind … Read more
Numerical Problems Based on Electric Potential Energy for Class 12 Physics Q.1. Find the amount of work done in arranging the three point charges, on the vertices of an equilateral triangle ABC, of side 10 cm, as shown in the adjacent figure. (Ans. – 3.24 J) Q.2. Two point charges +10μC and -lOμC are separated … Read more
Relation between Electric Field and Potential (1) Electric field in a region can be determined from the electric potential by using relation, (2) Electric field between two parallel conductors, E = V/d (3) Electric potential in a region can be determined from the electric field by using the relation, Numerical Problems Based on Relation between … Read more
Electric Potential Electric potential, also known as voltage, is a scalar quantity that represents the amount of electric potential energy per unit charge that is present at a point in space. In other words, it is the amount of work that would be required to move a unit positive charge from a reference point to … Read more
Numerical Problems Based on Continuous Charge Distributions for Class 12 Physics Here we are providing numerical problems based on Continuous Charge Distributions for Class 12 Physics. Numerical Problems on Electric Charge and Surface Charge Density Class 12 Physics · Electrostatics SQ Surface Charge Density Practice Set Apply $\sigma = \frac{q}{A}$ and volume conservation principles Ch … Read more
Electric Charge An electric charge is a fundamental property of matter that describes the amount of electrical energy associated with an object. It is a fundamental property of particles such as protons, electrons, and ions, which are the building blocks of matter. Electric charge is either positive or negative. Protons carry a positive charge, electrons … Read more
Electric Dipole An electric dipole is a system consisting of two electric charges of equal magnitude but opposite sign that are separated by a distance. The product of positive charge and the separation between the charges is referred to as the dipole moment, which is a vector quantity pointing from the negative charge to the … Read more
Electric Field An electric field is a vector field that describes the force exerted by a charged object on other charged objects in its vicinity. It is a fundamental concept in electromagnetism and is essential for understanding the behavior of electrically charged particles and systems. The electric field at a given point in space is … Read more
Principle of superposition of electrostatic forces. Coulomb’s law gives force between two point charges. The principle of superposition enables us to find the force on a point charge due to a group of point charges. This principle is based on the property that the forces with which two charges attract or repel each other are … Read more
Coulomb’s Law Coulomb’s law, named after French physicist Charles-Augustin de Coulomb, describes the electrostatic interaction between two electrically charged particles. The law states that the magnitude of the electrostatic force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. Mathematically, … Read more
Numerical Problems on Total Internal Reflection and Critical Angle Class 12 Physics · Ray Optics and Optical Instruments Here we are providing numerical problems based on topic total internal reflection and critical angle for class 12 physics. SQ Total Internal Reflection Practice Set Apply Snell’s Law and the Critical Angle formula $\sin C = \frac{\mu_{rarer}}{\mu_{denser}}$ … Read more
