01. Poynting vector, Energy transported by EM wave, Energy density
Electromagnetic Wave

155621 A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more is :

1 red
2 yellow
3 green
4 violet
Electromagnetic Wave

155622 If $\varepsilon_{0}$ and $\mu_{0}$ are the permittivity and permeability of free space and $\varepsilon$ and $\mu$ are the corresponding quantities for a medium. Then, refractive index of the medium is :

1 1
2 $\sqrt{\frac{\mu_{0} \varepsilon_{0}}{\mu \varepsilon}}$
3 insufficient information
4 $\sqrt{\frac{\mu \varepsilon}{\mu_{0} \varepsilon_{0}}}$
Electromagnetic Wave

155625 In Thomson's experiment to determine $\frac{\mathrm{e}}{\mathrm{m}}$ of an electron, it is found that an electron beam having a kinetic energy of $45.5 \mathrm{eV}$ remains unelected, when subjected to crossed electric and magnetic fields. If $\mathrm{E}=1 \times 10^{3} \mathrm{Vm}^{-1}$, the value of $B$ is (mass of the electron is $9.1 \times 1^{-31}$ kg)

1 $2.5 \times 10^{-3} \mathrm{~Wb} \mathrm{~m}^{-2}$
2 $5.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
3 $2.5 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
4 $1.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
Electromagnetic Wave

155626 Electromagnetic waves travel in a medium with a speed of $2 \times 10^{8} \mathrm{~m} / \mathrm{s}$. If the relative permeability of the medium is 1 , the relative permittivity will be

1 1.5
2 2.25
3 3.37
4 1.0
Electromagnetic Wave

155621 A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more is :

1 red
2 yellow
3 green
4 violet
Electromagnetic Wave

155622 If $\varepsilon_{0}$ and $\mu_{0}$ are the permittivity and permeability of free space and $\varepsilon$ and $\mu$ are the corresponding quantities for a medium. Then, refractive index of the medium is :

1 1
2 $\sqrt{\frac{\mu_{0} \varepsilon_{0}}{\mu \varepsilon}}$
3 insufficient information
4 $\sqrt{\frac{\mu \varepsilon}{\mu_{0} \varepsilon_{0}}}$
Electromagnetic Wave

155625 In Thomson's experiment to determine $\frac{\mathrm{e}}{\mathrm{m}}$ of an electron, it is found that an electron beam having a kinetic energy of $45.5 \mathrm{eV}$ remains unelected, when subjected to crossed electric and magnetic fields. If $\mathrm{E}=1 \times 10^{3} \mathrm{Vm}^{-1}$, the value of $B$ is (mass of the electron is $9.1 \times 1^{-31}$ kg)

1 $2.5 \times 10^{-3} \mathrm{~Wb} \mathrm{~m}^{-2}$
2 $5.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
3 $2.5 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
4 $1.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
Electromagnetic Wave

155626 Electromagnetic waves travel in a medium with a speed of $2 \times 10^{8} \mathrm{~m} / \mathrm{s}$. If the relative permeability of the medium is 1 , the relative permittivity will be

1 1.5
2 2.25
3 3.37
4 1.0
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Electromagnetic Wave

155621 A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more is :

1 red
2 yellow
3 green
4 violet
Electromagnetic Wave

155622 If $\varepsilon_{0}$ and $\mu_{0}$ are the permittivity and permeability of free space and $\varepsilon$ and $\mu$ are the corresponding quantities for a medium. Then, refractive index of the medium is :

1 1
2 $\sqrt{\frac{\mu_{0} \varepsilon_{0}}{\mu \varepsilon}}$
3 insufficient information
4 $\sqrt{\frac{\mu \varepsilon}{\mu_{0} \varepsilon_{0}}}$
Electromagnetic Wave

155625 In Thomson's experiment to determine $\frac{\mathrm{e}}{\mathrm{m}}$ of an electron, it is found that an electron beam having a kinetic energy of $45.5 \mathrm{eV}$ remains unelected, when subjected to crossed electric and magnetic fields. If $\mathrm{E}=1 \times 10^{3} \mathrm{Vm}^{-1}$, the value of $B$ is (mass of the electron is $9.1 \times 1^{-31}$ kg)

1 $2.5 \times 10^{-3} \mathrm{~Wb} \mathrm{~m}^{-2}$
2 $5.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
3 $2.5 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
4 $1.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
Electromagnetic Wave

155626 Electromagnetic waves travel in a medium with a speed of $2 \times 10^{8} \mathrm{~m} / \mathrm{s}$. If the relative permeability of the medium is 1 , the relative permittivity will be

1 1.5
2 2.25
3 3.37
4 1.0
Electromagnetic Wave

155621 A plane glass plate is placed over a various coloured letters (violet, green, yellow, red). The letter which appears to raised more is :

1 red
2 yellow
3 green
4 violet
Electromagnetic Wave

155622 If $\varepsilon_{0}$ and $\mu_{0}$ are the permittivity and permeability of free space and $\varepsilon$ and $\mu$ are the corresponding quantities for a medium. Then, refractive index of the medium is :

1 1
2 $\sqrt{\frac{\mu_{0} \varepsilon_{0}}{\mu \varepsilon}}$
3 insufficient information
4 $\sqrt{\frac{\mu \varepsilon}{\mu_{0} \varepsilon_{0}}}$
Electromagnetic Wave

155625 In Thomson's experiment to determine $\frac{\mathrm{e}}{\mathrm{m}}$ of an electron, it is found that an electron beam having a kinetic energy of $45.5 \mathrm{eV}$ remains unelected, when subjected to crossed electric and magnetic fields. If $\mathrm{E}=1 \times 10^{3} \mathrm{Vm}^{-1}$, the value of $B$ is (mass of the electron is $9.1 \times 1^{-31}$ kg)

1 $2.5 \times 10^{-3} \mathrm{~Wb} \mathrm{~m}^{-2}$
2 $5.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
3 $2.5 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
4 $1.0 \times 10^{-4} \mathrm{~Wb} \mathrm{~m}^{-2}$
Electromagnetic Wave

155626 Electromagnetic waves travel in a medium with a speed of $2 \times 10^{8} \mathrm{~m} / \mathrm{s}$. If the relative permeability of the medium is 1 , the relative permittivity will be

1 1.5
2 2.25
3 3.37
4 1.0