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Verify that the cyclotron frequency ω = eB/m has the correct dimensions of

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Consider a circular current-carrying loop of radius R in the x-y plane with centre at origin. Consider the line intergral ` ℑ (L) = |∫_(-L)^L B dl| ` taken along z-axis. Verify directly the above

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Consider a circular current-carrying loop of radius R in the x-y plane with centre at origin. Consider the line intergral ` ℑ (L) = |∫_(-L)^L B dl| ` taken along z-axis. Suppose we replace the circular coil by a square coil of sides R carrying the same

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A current of a 1 Amp is passed through a straight wire of length 2 meter. The magnetic field at a point in air at a distance of 3 meters from either end of wire and lying on the axis of wire will

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A proton is projected with a speed of `2 xx10^6 m/s` at an angle of `60^0` to the X-axis. If a uniform mag. field of 0.104 tesla is applied along Y-axis, the path of proton is

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A student connect a moving coil voltmeter V and 9 moving coil Ammeter A and resistor R as shown in figure ? If the voltmeter reads 10 volt and the ammeter reads 2 Amp then R is

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Assertion: In a region, where uniform electric field exists, the net charge within volume of any size is zero. Reason: The electric flux within any closed surface in a region of uniform electric field is

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Proton in an Electric Field Potential difference `(DeltaV)` between two points `A and B` separated by a distance `x`, in a uniform electric field `E` is given by `DeltaV =-Ex`, where `x` is measured parallel to the field lines. If a charge `q_0` moves from A to B, the change in potential energy `(DeltaU)` is given as `DeltaU=q_0 DeltaV`. A proton is released from rest in uniform electric field of magnitude `8.0 xx 10^4 Vm^(-1)` directed along the positive X-axis. The proton undergoes a displacement of 0.50 m in the direction of E.Mass of a proton `= 1.66 xx 10^(-27)

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At room temperature `(27.0°C)` the resistance of a heating element is `100 Omega`. What is the temperature of the element, if the resistance is found to be `117 Omega`, given that the temperature coefficient of the material of the resistor is `1.70 xx

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Commercial Electrical EnergyAn electrical appliance uses a lot of electric energy when it is operated e.g., geysers heaters etc. The electrical energy consumed is dependent on the time for which a specific appliance of fixed power rating is used. However, the energy used in hour is denoted as `1 kWh=3.6 xx 10^6` joule. This is represented as 1 unit. Different electrical appliance have difference power consumption which is mentioned on the device clearly.An electric heater consumes 1.5 kW power. If it used everyday for 2 hours, then electric energy used in January

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Lorentz Force and Its Effects A charged particle moving in an external magnetic field experiences a force, which is called Lorentz force, i.e. `F=q(v xx B)`,where `q` is the charge on the particle and v is the velocity of the particle. The direction of the force is given by the cross product of velocity vector and magnetic field vector at any time.The charge particle travels in a special trajectory called helical path. Because the force is always perpendicular to the velocity vector, the magnetic field can do no work on an isolate charge. Hence, the linear velocity always remains the

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Assertion: According to Gauss’s law for magnetism, the net magnetic flux through any closed surface is zero. Reason: The number of magnetic field lines leaving the surface is balanced by the number of lines entering

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An infinitely long cylinder is kept parallel to a uniform magnetic field B directed along positive Z-axis. The direction of induced current as seen from the Z-axis will

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A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40°. What is the refractive index of the material of the prism? The refracting angle of the prism is 60°. If the prism is placed in water (refractive index 1.33), predict the new angle of minimum deviation of a parallel beam of

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A beam of light converges at a point P. Now a lens is placed in the path of the convergent beam 12cm from P. At what point does the beam converge if the lens is a convex lens of focal length

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Use the mirror equation to deduce that: an object placed between the pole and focus of a concave mirror produces a virtual and enlarged image. [Note: This exercise helps you deduce algebraically properties of images that one obtains from explicit ray

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A biconvex lens made of a transparent material of refractive index 1.25 is immersed in a water of refractive index 1.33. Will the lens behave as a- converging or a diverging lens? Give

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An object AB is kept in front of a concave mirror as shown in the figure.(i) Complete the ray diagram showing the image formation of the object. (ii) How will the position and intensity of the image be affected if the lower half of the mirror's reflecting surface is painted

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A giant reflecting telescope at an observatory has an objective lens of focal length 15 m. If an eyepiece lens of focal length 1.0 cm is used, find the angular magnification of the telescope.If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens? The diameter of the moon is `3.42xx10^6` m and the radius of the lunar orbit is `3.8xx10^8

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What is the effect on the interference fringes in a Young’s double-slit experiment due to: the source slit is moved closer to the double-slit

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