155569
Light wave is travelling along y-direction. If the corresponding $\overrightarrow{\mathbf{E}}$ vector at any time is along the $x$-axis, the direction of $\vec{B}$ vector at that time is along
1 y-axis
2 $x$-axis
3 +z-axis
4 -z-axis
Explanation:
C If light wave is travelling along y-direction \& $\overrightarrow{\mathrm{E}}$ vector travelling $\mathrm{X}$-direction then $\overrightarrow{\mathrm{B}}$ vector will in $+\mathrm{z}$ direction because, $\overrightarrow{\mathrm{E}}, \overrightarrow{\mathrm{B}}$ and wave are perpendicular to each other.
AIIMS-2015
Electromagnetic Wave
155574
An electromagnetic wave propagating along north has its electric field vector vertically upward. The magnetic field vector points towards
1 downward
2 east
3 north
4 south
Explanation:
B According to right hand thumb rule, if the direction of propagation of electromagnetic wave is in north, then the direction of magnetic field vector will be in east.
VITEEE-2015
Electromagnetic Wave
155576
In an electromagnetic wave, the average energy density associated with magnetic field is
1 $\mathrm{Li}_{0}^{2} / 2$
2 $\mathrm{B}^{2} / 2 \mu_{\mathrm{o}}$
3 $\mu_{0} \mathrm{~B}^{2} / 2$
4 $\mu_{0} / 2 \mathrm{~B}^{2}$
Explanation:
B The average energy density associated with magnetic field is given by, $\mathrm{U}_{\mathrm{B}}=\frac{1}{2} \frac{\mathrm{B}^{2}}{\mu_{\mathrm{o}}}$
VITEEE-2011
Electromagnetic Wave
155578
When an electrical appliance is switched on, it responds almost immediately, because
1 the electrons in the connecting wires move with the speed of light
2 the electrical signal is carried by electromagnetic waves moving with the speed of light
3 the electrons move with the speed which is close to but less than speed of light
4 the electrons are stagnant.
Explanation:
B Electrical signals are carried by electromagnetic waves moving with the speed of light. Hence, when an electrical appliance is switched on, it responds almost immediately.
VITEEE-2008
Electromagnetic Wave
155582
The transverse nature of electromagnetic waves is proved by which of the following?
1 Interference phenomena
2 Diffraction phenomena
3 Dispersion phenomena
4 Polarization phenomena
Explanation:
D The transverse nature of EM wave is provided by phenomenon of polarization. Phenomenon of restricting the vibration of light in a direction perpendicular to the motion of wave is called polarization. It helps to provide transverse nature of EM wave.
155569
Light wave is travelling along y-direction. If the corresponding $\overrightarrow{\mathbf{E}}$ vector at any time is along the $x$-axis, the direction of $\vec{B}$ vector at that time is along
1 y-axis
2 $x$-axis
3 +z-axis
4 -z-axis
Explanation:
C If light wave is travelling along y-direction \& $\overrightarrow{\mathrm{E}}$ vector travelling $\mathrm{X}$-direction then $\overrightarrow{\mathrm{B}}$ vector will in $+\mathrm{z}$ direction because, $\overrightarrow{\mathrm{E}}, \overrightarrow{\mathrm{B}}$ and wave are perpendicular to each other.
AIIMS-2015
Electromagnetic Wave
155574
An electromagnetic wave propagating along north has its electric field vector vertically upward. The magnetic field vector points towards
1 downward
2 east
3 north
4 south
Explanation:
B According to right hand thumb rule, if the direction of propagation of electromagnetic wave is in north, then the direction of magnetic field vector will be in east.
VITEEE-2015
Electromagnetic Wave
155576
In an electromagnetic wave, the average energy density associated with magnetic field is
1 $\mathrm{Li}_{0}^{2} / 2$
2 $\mathrm{B}^{2} / 2 \mu_{\mathrm{o}}$
3 $\mu_{0} \mathrm{~B}^{2} / 2$
4 $\mu_{0} / 2 \mathrm{~B}^{2}$
Explanation:
B The average energy density associated with magnetic field is given by, $\mathrm{U}_{\mathrm{B}}=\frac{1}{2} \frac{\mathrm{B}^{2}}{\mu_{\mathrm{o}}}$
VITEEE-2011
Electromagnetic Wave
155578
When an electrical appliance is switched on, it responds almost immediately, because
1 the electrons in the connecting wires move with the speed of light
2 the electrical signal is carried by electromagnetic waves moving with the speed of light
3 the electrons move with the speed which is close to but less than speed of light
4 the electrons are stagnant.
Explanation:
B Electrical signals are carried by electromagnetic waves moving with the speed of light. Hence, when an electrical appliance is switched on, it responds almost immediately.
VITEEE-2008
Electromagnetic Wave
155582
The transverse nature of electromagnetic waves is proved by which of the following?
1 Interference phenomena
2 Diffraction phenomena
3 Dispersion phenomena
4 Polarization phenomena
Explanation:
D The transverse nature of EM wave is provided by phenomenon of polarization. Phenomenon of restricting the vibration of light in a direction perpendicular to the motion of wave is called polarization. It helps to provide transverse nature of EM wave.
155569
Light wave is travelling along y-direction. If the corresponding $\overrightarrow{\mathbf{E}}$ vector at any time is along the $x$-axis, the direction of $\vec{B}$ vector at that time is along
1 y-axis
2 $x$-axis
3 +z-axis
4 -z-axis
Explanation:
C If light wave is travelling along y-direction \& $\overrightarrow{\mathrm{E}}$ vector travelling $\mathrm{X}$-direction then $\overrightarrow{\mathrm{B}}$ vector will in $+\mathrm{z}$ direction because, $\overrightarrow{\mathrm{E}}, \overrightarrow{\mathrm{B}}$ and wave are perpendicular to each other.
AIIMS-2015
Electromagnetic Wave
155574
An electromagnetic wave propagating along north has its electric field vector vertically upward. The magnetic field vector points towards
1 downward
2 east
3 north
4 south
Explanation:
B According to right hand thumb rule, if the direction of propagation of electromagnetic wave is in north, then the direction of magnetic field vector will be in east.
VITEEE-2015
Electromagnetic Wave
155576
In an electromagnetic wave, the average energy density associated with magnetic field is
1 $\mathrm{Li}_{0}^{2} / 2$
2 $\mathrm{B}^{2} / 2 \mu_{\mathrm{o}}$
3 $\mu_{0} \mathrm{~B}^{2} / 2$
4 $\mu_{0} / 2 \mathrm{~B}^{2}$
Explanation:
B The average energy density associated with magnetic field is given by, $\mathrm{U}_{\mathrm{B}}=\frac{1}{2} \frac{\mathrm{B}^{2}}{\mu_{\mathrm{o}}}$
VITEEE-2011
Electromagnetic Wave
155578
When an electrical appliance is switched on, it responds almost immediately, because
1 the electrons in the connecting wires move with the speed of light
2 the electrical signal is carried by electromagnetic waves moving with the speed of light
3 the electrons move with the speed which is close to but less than speed of light
4 the electrons are stagnant.
Explanation:
B Electrical signals are carried by electromagnetic waves moving with the speed of light. Hence, when an electrical appliance is switched on, it responds almost immediately.
VITEEE-2008
Electromagnetic Wave
155582
The transverse nature of electromagnetic waves is proved by which of the following?
1 Interference phenomena
2 Diffraction phenomena
3 Dispersion phenomena
4 Polarization phenomena
Explanation:
D The transverse nature of EM wave is provided by phenomenon of polarization. Phenomenon of restricting the vibration of light in a direction perpendicular to the motion of wave is called polarization. It helps to provide transverse nature of EM wave.
155569
Light wave is travelling along y-direction. If the corresponding $\overrightarrow{\mathbf{E}}$ vector at any time is along the $x$-axis, the direction of $\vec{B}$ vector at that time is along
1 y-axis
2 $x$-axis
3 +z-axis
4 -z-axis
Explanation:
C If light wave is travelling along y-direction \& $\overrightarrow{\mathrm{E}}$ vector travelling $\mathrm{X}$-direction then $\overrightarrow{\mathrm{B}}$ vector will in $+\mathrm{z}$ direction because, $\overrightarrow{\mathrm{E}}, \overrightarrow{\mathrm{B}}$ and wave are perpendicular to each other.
AIIMS-2015
Electromagnetic Wave
155574
An electromagnetic wave propagating along north has its electric field vector vertically upward. The magnetic field vector points towards
1 downward
2 east
3 north
4 south
Explanation:
B According to right hand thumb rule, if the direction of propagation of electromagnetic wave is in north, then the direction of magnetic field vector will be in east.
VITEEE-2015
Electromagnetic Wave
155576
In an electromagnetic wave, the average energy density associated with magnetic field is
1 $\mathrm{Li}_{0}^{2} / 2$
2 $\mathrm{B}^{2} / 2 \mu_{\mathrm{o}}$
3 $\mu_{0} \mathrm{~B}^{2} / 2$
4 $\mu_{0} / 2 \mathrm{~B}^{2}$
Explanation:
B The average energy density associated with magnetic field is given by, $\mathrm{U}_{\mathrm{B}}=\frac{1}{2} \frac{\mathrm{B}^{2}}{\mu_{\mathrm{o}}}$
VITEEE-2011
Electromagnetic Wave
155578
When an electrical appliance is switched on, it responds almost immediately, because
1 the electrons in the connecting wires move with the speed of light
2 the electrical signal is carried by electromagnetic waves moving with the speed of light
3 the electrons move with the speed which is close to but less than speed of light
4 the electrons are stagnant.
Explanation:
B Electrical signals are carried by electromagnetic waves moving with the speed of light. Hence, when an electrical appliance is switched on, it responds almost immediately.
VITEEE-2008
Electromagnetic Wave
155582
The transverse nature of electromagnetic waves is proved by which of the following?
1 Interference phenomena
2 Diffraction phenomena
3 Dispersion phenomena
4 Polarization phenomena
Explanation:
D The transverse nature of EM wave is provided by phenomenon of polarization. Phenomenon of restricting the vibration of light in a direction perpendicular to the motion of wave is called polarization. It helps to provide transverse nature of EM wave.
155569
Light wave is travelling along y-direction. If the corresponding $\overrightarrow{\mathbf{E}}$ vector at any time is along the $x$-axis, the direction of $\vec{B}$ vector at that time is along
1 y-axis
2 $x$-axis
3 +z-axis
4 -z-axis
Explanation:
C If light wave is travelling along y-direction \& $\overrightarrow{\mathrm{E}}$ vector travelling $\mathrm{X}$-direction then $\overrightarrow{\mathrm{B}}$ vector will in $+\mathrm{z}$ direction because, $\overrightarrow{\mathrm{E}}, \overrightarrow{\mathrm{B}}$ and wave are perpendicular to each other.
AIIMS-2015
Electromagnetic Wave
155574
An electromagnetic wave propagating along north has its electric field vector vertically upward. The magnetic field vector points towards
1 downward
2 east
3 north
4 south
Explanation:
B According to right hand thumb rule, if the direction of propagation of electromagnetic wave is in north, then the direction of magnetic field vector will be in east.
VITEEE-2015
Electromagnetic Wave
155576
In an electromagnetic wave, the average energy density associated with magnetic field is
1 $\mathrm{Li}_{0}^{2} / 2$
2 $\mathrm{B}^{2} / 2 \mu_{\mathrm{o}}$
3 $\mu_{0} \mathrm{~B}^{2} / 2$
4 $\mu_{0} / 2 \mathrm{~B}^{2}$
Explanation:
B The average energy density associated with magnetic field is given by, $\mathrm{U}_{\mathrm{B}}=\frac{1}{2} \frac{\mathrm{B}^{2}}{\mu_{\mathrm{o}}}$
VITEEE-2011
Electromagnetic Wave
155578
When an electrical appliance is switched on, it responds almost immediately, because
1 the electrons in the connecting wires move with the speed of light
2 the electrical signal is carried by electromagnetic waves moving with the speed of light
3 the electrons move with the speed which is close to but less than speed of light
4 the electrons are stagnant.
Explanation:
B Electrical signals are carried by electromagnetic waves moving with the speed of light. Hence, when an electrical appliance is switched on, it responds almost immediately.
VITEEE-2008
Electromagnetic Wave
155582
The transverse nature of electromagnetic waves is proved by which of the following?
1 Interference phenomena
2 Diffraction phenomena
3 Dispersion phenomena
4 Polarization phenomena
Explanation:
D The transverse nature of EM wave is provided by phenomenon of polarization. Phenomenon of restricting the vibration of light in a direction perpendicular to the motion of wave is called polarization. It helps to provide transverse nature of EM wave.
