Physics
The magnetic field of a beam emerging from a filter facing a floodlight is given by B0 = 12 × 10^–8 sin (1.20 × 10^7 z – 3.60 × 10^15 t) T. What is the average intensity of the beam?
04
Sep
The magnetic field of a beam emerging from a filter facing a floodlight is given by B0 = 12 × 10^–8 sin (1.20 × 10^7 z – 3.60 × 10^15 t) T. What is the average intensity of the beam? The magnetic field of a beam emerging from a filter facing a floodlight is given [...]
A variable frequency AC source is connected to a capacitor. How will the displacement current change with decrease in frequency?
04
Sep
A variable frequency AC source is connected to a capacitor. How will the displacement current change with decrease in frequency? A variable frequency AC source is connected to a capacitor. How will the displacement current change with decrease in frequency? September 4, 2021 Category: Chapter 8 - Electromagnetic Waves , NCERT Exemplar Class 12 , [...]
The charge on a parallel plate capacitor varies as =q_0 cos 2pi ft. The plates are very large and close together (area=a, separation=d). Neglecting the edge effects, find the displacement current through the capacitor.
04
Sep
The charge on a parallel plate capacitor varies as =q_0 cos 2pi ft. The plates are very large and close together (area=a, separation=d). Neglecting the edge effects, find the displacement current through the capacitor. find the displacement current through the capacitor. separation=d). Neglecting the edge effects The charge on a parallel plate capacitor varies as [...]
An electromagnetic wave of intensity I falls on a surface kept in vacuum and exerts radiation pressure p on it. Which of the following are true?
04
Sep
An electromagnetic wave of intensity I falls on a surface kept in vacuum and exerts radiation pressure p on it. Which of the following are true? An electromagnetic wave of intensity I falls on a surface kept in vacuum and exerts radiation pressure p on it. Which of the following are true? September 4, 2021 [...]
A charged particle oscillates about its mean equilibrium position with a frequency of 10^(9) Hz. The electromagnetic waves produced
04
Sep
A charged particle oscillates about its mean equilibrium position with a frequency of 10^(9) Hz. The electromagnetic waves produced A charged particle oscillates about its mean equilibrium position with a frequency of 10^(9) Hz. The electromagnetic waves produced September 4, 2021 Category: Chapter 8 - Electromagnetic Waves , NCERT Exemplar Class 12 , Physics ,
A plane electromagnetic wave propagating along x direction can have the following pairs of E and B .
04
Sep
A plane electromagnetic wave propagating along x direction can have the following pairs of E and B . A plane electromagnetic wave propagating along x direction can have the following pairs of E and B . September 4, 2021 Category: Chapter 8 - Electromagnetic Waves , NCERT Exemplar Class 12 , Physics ,
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is:
04
Sep
The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: The ratio of contributions made by the electric field and magnetic field components to the intensity of an electromagnetic wave is: September 4, 2021 Category: Chapter 8 - Electromagnetic Waves , NCERT Exemplar Class [...]
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is:
04
Sep
The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is: In a plane electromagnetic wave the electric field oscillates sinusoidally at a frequency of 2.0×10^10 Hz and [...]
Light with an energy flux 20 W/cm^2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm^2. the total momentum delivered ( for complete absorption) during 30 minutes is
04
Sep
Light with an energy flux 20 W/cm^2 falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm^2. the total momentum delivered ( for complete absorption) during 30 minutes is A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric [...]
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0×10^10 Hz and amplitude 48Vm^−1 .
04
Sep
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0×10^10 Hz and amplitude 48Vm^−1 . In a plane electromagnetic wave the electric field oscillates sinusoidally at a frequency of 2.0×10^10 Hz and amplitude 48Vm^−1 . September 4, 2021 Category: Chapter 8 - Electromagnetic Waves , NCERT Exemplar Class 12 , [...]