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#1 Class 12 Physics Current Electricity 2025 Short 2M CBSE

What is the order of magnitude of drift velocity of electrons in a conductor ? Deduce the relation between the current flowing through a conductor and drift velocity of electrons in it.

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#2 Class 12 Physics Current Electricity 2025 Mcq 1M CBSE

Two heaters rated as (P$_{1}$, V) and (P$_{2}$, V) are connected in series across a dc source of 2 volt. The power consumed by the combination will be –

A. (P$_{1}$ + P$_{2}$)

B. 2 P$_{1}$ P 2 P$_{1}$ P

C. 2(P + P )

D. 4(P + P ) (R) (A), (B), (A) (A) (R) (R), (A) (B) (A) (R) , (R), (A) (C) (A) , (R) (D) (A) (R)

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#3 Class 12 Physics Electrostatic Potential and Capacitance 2025 Mcq 1M CBSE

Two points R and S are equidistant from two charges + Q and – 2Q. The work done in moving a charge – Q from point R to S is :

A. Zero

B. – (A) 6.0 fm (B) 30 fm

C. 72 fm

D. 150 fm (A) (R) (A), (B), (C) (D) (A) (A) (R) (R), (A) (B) (A) (R) , (R), (A) (C) (A) , (R) (D) (A) (R)

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#4 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

Differentiate between conduction current and displacement current. A capacitor is connected across a source providing time-dependent current. Explain how the total current at an instant is the sum of conduction curren...

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#5 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

What is displacement current (id) ? Considering the case of charging of a capacitor, show that id = 0 . What is the value of id for a conductor across which a constant voltage is applied ?

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#6 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

Two parallel plate capacitors X and Y are connected in series to a 6 V battery. They have the same plate area and same plate separation but capacitor X has air between its plates, whereas capacitor Y contains a materi...

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#7 Class 12 Physics Electrostatic Potential and Capacitance 2025 Mcq 1M CBSE

The figure represents the variation of the electric potential V at a point in a region of space as a function of its position along the x-axis. A charged particle will experience the maximum force at :

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#8 Class 12 Physics Electrostatic Potential and Capacitance 2025 Long 4M CBSE

A charged particle +q in an electric field E experiences a force in the direction of the electric field. As a result, its kinetic energy changes. Similarly, the charged particle also experiences a force when it moves ...

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#9 Class 12 Physics Electrostatic Potential and Capacitance 2025 Long 4M CBSE

Capacitors are manufactured with certain standard capacitances and working voltages. However, these standard values may not be the ones that are actually needed in a particular application. Two or more capacitors can ...

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#10 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 5M CBSE

(i) the force F on a charge q placed at that point. (ii) the potential at that point due to charge Q. (a) Deduce the relation between the electric field (E) at a point due to a charge Q and (a) Derive an expression fo...

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#11 Class 12 Physics Electrostatic Potential and Capacitance 2025 Mcq 1M CBSE

An electron and a proton are accelerated through the same potential difference. Let e and p be the de Broglie wavelength associated with electron and proton respectively. Then e/p is 1 (A) me/mp (B) mp/me me mp mp me

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#12 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

(a) A particle of charge q and mass m is accelerated through a potential difference V. Deduce an expression for the de Broglie wavelength associated with the particle. 3 (b) Plot a graph for a particle of charge q and...

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#13 Class 12 Physics Electrostatic Potential and Capacitance 2025 Mcq 1M CBSE

Three point charges +q, –2q and +q are placed along x-axis at points x = –1 m, x = 0 m and x = 2 m respectively. The potential energy of the system is

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#14 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 5M CBSE

(i) This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ? (ii) Two copper wires having their radii in the ratio o...

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#15 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

(a) An electric field E = E$_{0}$ i exists in a region of space. Draw three equipotential surfaces in the region. 3 (b) Two point charges –q and +q are located at points (–a, 0, 0) and (a, 0, 0) respectively. Find the...

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#16 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 2M CBSE

Find ratio (a/p) of the de Broglie wavelength a and p associated respectively with an alpha particle and a proton, 2 (i) if they are moving with the same kinetic energy. (ii) just after they are accelerated through th...

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#17 Class 12 Physics Electrostatic Potential and Capacitance 2025 Mcq 1M CBSE

The figure shows the variation of capacitive reactance (XC) of two ideal capacitors of capacitances C$_{1}$ & $C^2$ with the reciprocal of angular frequency (1/) of ac source. The value of C$_{1}$/$C^2$ is 1 (R)

A. ,

B. ,

C. (A) (A) (R) (R), (A) (B) (A) (R) , (R), (A) (C) (A) , (R)

D. (A) (R)

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#18 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

A parallel plate capacitor of capacitance C is charged to V volt by a battery. After sometime the battery is disconnected and the distance between the plates is doubled. A slab of dielectric constant k = 1.8 is then i...

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#19 Class 12 Physics Electrostatic Potential and Capacitance 2025 Mcq 1M CBSE

The electric potential for various points in x-y plane is given by V = 1.0 x$_{2}$ – 2.0 y$_{2}$, where V is in volts and x, y are in metres. The angle that the electric field at point (2.0 m, 1.0 m) makes with the po...

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#20 Class 12 Physics Electrostatic Potential and Capacitance 2025 Short 3M CBSE

A 12.0 F capacitor is charged to a potential difference of 150 V. The terminals of the charged capacitor are then connected to those of an uncharged 6.0 F capacitor. Calculate final potential difference across and cha...

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