JEE Mains · Physics · STD 12 - 8. Electromagnetic waves
Match List - \(I\) with List - \(II.\)
| List - \(I\) | List - \(II\) |
| \((a)\) Source of microwave frequency | \((i)\) Radioactive decay on nucleus |
| \((b)\) Source of infrared frequency | \((ii)\) Magnetron |
| \((c)\) Source of Gamma Rays | \((iii)\) Inner shell electrons |
| \((d)\) Source of \(X-\)rays | \((iv)\) Vibration of atoms and molecules |
| \((v)\) \(LASER\) | |
| \((vi)\) \(RC\) circuit |
- A \((a)-(vi), (b)-(iv), (c)-(i), (d)-(v)\)
- B \((a)-(vi), (b)-(v), (c)-(i), (d)-(iv)\)
- C \((a)-(ii), (b)-(iv), (c)-(vi), (d)-(iii)\)
- D \((a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)\)
Answer & Solution
Correct Answer
(D) \((a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)\)
Step-by-step Solution
Detailed explanation
\((a)\) Source of microwave frequency is magnetron. \((b)\) Source of infrared frequency is vibration of atoms and molecules. \((c)\) Source of Gamma rays is radioactive decay of nucleus \((d)\) Source of X-rays inner shell electron transition.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A nucleus with mass number \(184\) initially at rest emits an \(\alpha\)-particle. If the \(Q\) value of the reaction is \(5.5\, {MeV}\), calculate the kinetic energy of the \(\alpha-\) particle. (In \({MeV}\))JEE Mains 2021 Hard
- A parallel plate capacitor has charge \(5 \times 10^{-6} \mathrm{C}\). A dielectric slab is inserted between the plates and almost fills the space between the plates. If the induced charge on one face of the slab is \(4 \times 10^{-6} \mathrm{C}\) then the dielectric constant of the slab is ________.JEE Mains 2025 Medium
- Two magnetic dipoles \(X\) and \(Y\) are placed at a separation \(d\), with their axes perpendicular to each other. The dipole moment of \(Y\) is twice that of \(X\). A particle of charge \(q\) is passing through their mid-point \(P\), at angle \(\theta = 45^o\) with the horizontal line as shown in the figure. What would be the magnitude of force on the particle at that instant ? (\(d\) is much larger than the dimensions of the dipole)
JEE Mains 2019 Hard - Which of the following combinations has the dimension of electrical resistance ( \({ \varepsilon _0}\) is the permittivity of vacuum and \({\mu _0}\) is the permeability of vacuum) ?JEE Mains 2019 Medium
- The speed of electrons in a scanning electron microscope is \(1 \times 10^{7} \,ms ^{-1}\). If the protons having the same speed are used instead of electrons, then the resolving power of scanning proton microscope will be changed by a factor of:JEE Mains 2021 Medium
- A parallel plate capacitor is made of two plates of length \(l\), width \(w\) and separated by distance \(d\). A dielectric slab ( dielectric constant \(K\)) that fits exactly between the plates is held near the edge of the plates. It is pulled into the capacitor by a force \(F = -\frac{{\partial U}}{{\partial x}}\) where \(U\) is the energy of the capacitor when dielectric is inside the capacitor up to distance \(x\) (See figure). If the charge on the capacitor is \(Q\) then the force on the dielectric when it is near the edge is
JEE Mains 2014 Hard
More PYQs from JEE Mains
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Net dipole moment of a polar linear isotropic dielectric substance is not zero even in the absence of an external electric field.
Reason (R) : In absence of an external electric field, the different permanent dipoles of a polar dielectric substance are oriented in random directions.
In the light of the above statements, choose the most appropriate answer from the options given below :JEE Mains 2025 Easy - Match List \(- I\) with List \(- II\)
Choose the correct answer from the options given below:List\(-I\) (Layer of atmosphere) List\(-II\) (Approximate height over earth's surface) \((A)\) \(F_1\) - Layer \((I)\) \(10\,km\) \((B)\) \(D-\) Layer \((II)\) \(170-190\,km\) \((C)\) Troposphere \((III)\) \(100\,km\) \((D)\) \(E-\)layer \((IV)\) \(65-75\,km\) JEE Mains 2023 Medium - The coefficient of static friction between a wooden block of mass \(0.5\, kg\) and a vertical rough wall is \(0.2\) The magnitude of horizontal force that should be applied on the block to keep it adhere to the wall will be \(N\) \(\left[ g =10\, ms ^{-2}\right]\)JEE Mains 2021 Medium
- Two nuclei of mass number \(3\) combine with another nucleus of mass number \(4\) to yield a nucleus of mass number \(10\). If the binding energy per nucleon for the mass numbers \(3\), \(4\) and \(10\) are \(5.6\) MeV, \(7.4\) MeV and \(6.1\) MeV, respectively, then in the process, \(\Delta Mc^2 = \) _____ MeV.JEE Mains 2026 Medium
- A very long wire \(ABDMNDC\) is shown in figure carrying current \(I. AB\) and \(BC\) parts are straight, long and at right angle. At \(D\) wire forms a circular turn \(DMND\) of radius \(R. AB.\) \(\mathrm{BC}\) parts are tangential to circular turn at \(\mathrm{N}\) and \(D\). Magnetic field at the centre of circle is
JEE Mains 2020 Hard - If the Rolle's theorem holds for the function \(f(x) = 2x^3 + ax^2 + bx\) in the interval \([-1, 1 ]\) for the point \(c = \frac{1}{2}\) , then the value of \(2a + b\) isJEE Mains 2015 Hard