NEET Test Series from KOTA - 10 Papers In MS WORD
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WAVE OPTICS
283069
Which of the following generates a plane wavefront?
1 Point source
2 Extended source
3 Monochromatic source
4 All light sources
Explanation:
: An extended source can produce plane wave front. A point source produces spherical wave front. For example: Rays coming from infinity, like sun.
AP EAMCET (21.09.2020) Shift-II
WAVE OPTICS
283072
How many orders will be visible if the wavelength of the incident radiation is \(500 \AA\) and the number of lines on the grating is \(\mathbf{2 6 2 0}\) in one inch?
1 20
2 19
3 18
4 15
Explanation:
: Given that, \(\lambda=5000 \AA=500 \times 10^{-10} \mathrm{~m}\) \(\mathrm{d}=\frac{1}{2620}\) per inch \(=\frac{1}{2620 / 0.0284}=\frac{1}{10314}\) per meter We know that, \(\because \quad \mathrm{n} \lambda =\mathrm{d} \sin \theta\) \(\mathrm{n} \lambda =\mathrm{d} \quad\left(\because \theta=90^{\circ}\right)\)
SRMJEE-2019
WAVE OPTICS
283073
If a full wave rectifier circuit is operated from \(100 \mathrm{~Hz}\) mains, the fundamental frequency in the ripple will be
1 \(100 \mathrm{~Hz}\)
2 \(200 \mathrm{~Hz}\)
3 \(50 \mathrm{~Hz}\)
4 \(150 \mathrm{~Hz}\)
Explanation:
: For full wave rectifier, the fundamental frequency in ripple is twice that of input frequency. Fundamental frequency \(=2 \times\) input frequency \(=2 \times 100\) \(=200 \mathrm{~Hz}\)
CG PET 2019
WAVE OPTICS
283074
Matter waves are
1 Mechanical waves
2 Electromagnetic waves
3 Photons
4 Waves associated with a moving particle under suitable conditions
Explanation:
: Matter waves are waves associated with a moving particle under suitable conditions. - Matter waves are waves associated with every moving particle and therefore are neither mechanical nor electromagnetic waves. We know that, \(\lambda=\mathrm{h} \times \mathrm{p}\)Where, \(\lambda=\) Wavelength \(\mathrm{h}=\) Planck's constant \(\mathrm{p}=\) Particle's moment
283069
Which of the following generates a plane wavefront?
1 Point source
2 Extended source
3 Monochromatic source
4 All light sources
Explanation:
: An extended source can produce plane wave front. A point source produces spherical wave front. For example: Rays coming from infinity, like sun.
AP EAMCET (21.09.2020) Shift-II
WAVE OPTICS
283072
How many orders will be visible if the wavelength of the incident radiation is \(500 \AA\) and the number of lines on the grating is \(\mathbf{2 6 2 0}\) in one inch?
1 20
2 19
3 18
4 15
Explanation:
: Given that, \(\lambda=5000 \AA=500 \times 10^{-10} \mathrm{~m}\) \(\mathrm{d}=\frac{1}{2620}\) per inch \(=\frac{1}{2620 / 0.0284}=\frac{1}{10314}\) per meter We know that, \(\because \quad \mathrm{n} \lambda =\mathrm{d} \sin \theta\) \(\mathrm{n} \lambda =\mathrm{d} \quad\left(\because \theta=90^{\circ}\right)\)
SRMJEE-2019
WAVE OPTICS
283073
If a full wave rectifier circuit is operated from \(100 \mathrm{~Hz}\) mains, the fundamental frequency in the ripple will be
1 \(100 \mathrm{~Hz}\)
2 \(200 \mathrm{~Hz}\)
3 \(50 \mathrm{~Hz}\)
4 \(150 \mathrm{~Hz}\)
Explanation:
: For full wave rectifier, the fundamental frequency in ripple is twice that of input frequency. Fundamental frequency \(=2 \times\) input frequency \(=2 \times 100\) \(=200 \mathrm{~Hz}\)
CG PET 2019
WAVE OPTICS
283074
Matter waves are
1 Mechanical waves
2 Electromagnetic waves
3 Photons
4 Waves associated with a moving particle under suitable conditions
Explanation:
: Matter waves are waves associated with a moving particle under suitable conditions. - Matter waves are waves associated with every moving particle and therefore are neither mechanical nor electromagnetic waves. We know that, \(\lambda=\mathrm{h} \times \mathrm{p}\)Where, \(\lambda=\) Wavelength \(\mathrm{h}=\) Planck's constant \(\mathrm{p}=\) Particle's moment
283069
Which of the following generates a plane wavefront?
1 Point source
2 Extended source
3 Monochromatic source
4 All light sources
Explanation:
: An extended source can produce plane wave front. A point source produces spherical wave front. For example: Rays coming from infinity, like sun.
AP EAMCET (21.09.2020) Shift-II
WAVE OPTICS
283072
How many orders will be visible if the wavelength of the incident radiation is \(500 \AA\) and the number of lines on the grating is \(\mathbf{2 6 2 0}\) in one inch?
1 20
2 19
3 18
4 15
Explanation:
: Given that, \(\lambda=5000 \AA=500 \times 10^{-10} \mathrm{~m}\) \(\mathrm{d}=\frac{1}{2620}\) per inch \(=\frac{1}{2620 / 0.0284}=\frac{1}{10314}\) per meter We know that, \(\because \quad \mathrm{n} \lambda =\mathrm{d} \sin \theta\) \(\mathrm{n} \lambda =\mathrm{d} \quad\left(\because \theta=90^{\circ}\right)\)
SRMJEE-2019
WAVE OPTICS
283073
If a full wave rectifier circuit is operated from \(100 \mathrm{~Hz}\) mains, the fundamental frequency in the ripple will be
1 \(100 \mathrm{~Hz}\)
2 \(200 \mathrm{~Hz}\)
3 \(50 \mathrm{~Hz}\)
4 \(150 \mathrm{~Hz}\)
Explanation:
: For full wave rectifier, the fundamental frequency in ripple is twice that of input frequency. Fundamental frequency \(=2 \times\) input frequency \(=2 \times 100\) \(=200 \mathrm{~Hz}\)
CG PET 2019
WAVE OPTICS
283074
Matter waves are
1 Mechanical waves
2 Electromagnetic waves
3 Photons
4 Waves associated with a moving particle under suitable conditions
Explanation:
: Matter waves are waves associated with a moving particle under suitable conditions. - Matter waves are waves associated with every moving particle and therefore are neither mechanical nor electromagnetic waves. We know that, \(\lambda=\mathrm{h} \times \mathrm{p}\)Where, \(\lambda=\) Wavelength \(\mathrm{h}=\) Planck's constant \(\mathrm{p}=\) Particle's moment
283069
Which of the following generates a plane wavefront?
1 Point source
2 Extended source
3 Monochromatic source
4 All light sources
Explanation:
: An extended source can produce plane wave front. A point source produces spherical wave front. For example: Rays coming from infinity, like sun.
AP EAMCET (21.09.2020) Shift-II
WAVE OPTICS
283072
How many orders will be visible if the wavelength of the incident radiation is \(500 \AA\) and the number of lines on the grating is \(\mathbf{2 6 2 0}\) in one inch?
1 20
2 19
3 18
4 15
Explanation:
: Given that, \(\lambda=5000 \AA=500 \times 10^{-10} \mathrm{~m}\) \(\mathrm{d}=\frac{1}{2620}\) per inch \(=\frac{1}{2620 / 0.0284}=\frac{1}{10314}\) per meter We know that, \(\because \quad \mathrm{n} \lambda =\mathrm{d} \sin \theta\) \(\mathrm{n} \lambda =\mathrm{d} \quad\left(\because \theta=90^{\circ}\right)\)
SRMJEE-2019
WAVE OPTICS
283073
If a full wave rectifier circuit is operated from \(100 \mathrm{~Hz}\) mains, the fundamental frequency in the ripple will be
1 \(100 \mathrm{~Hz}\)
2 \(200 \mathrm{~Hz}\)
3 \(50 \mathrm{~Hz}\)
4 \(150 \mathrm{~Hz}\)
Explanation:
: For full wave rectifier, the fundamental frequency in ripple is twice that of input frequency. Fundamental frequency \(=2 \times\) input frequency \(=2 \times 100\) \(=200 \mathrm{~Hz}\)
CG PET 2019
WAVE OPTICS
283074
Matter waves are
1 Mechanical waves
2 Electromagnetic waves
3 Photons
4 Waves associated with a moving particle under suitable conditions
Explanation:
: Matter waves are waves associated with a moving particle under suitable conditions. - Matter waves are waves associated with every moving particle and therefore are neither mechanical nor electromagnetic waves. We know that, \(\lambda=\mathrm{h} \times \mathrm{p}\)Where, \(\lambda=\) Wavelength \(\mathrm{h}=\) Planck's constant \(\mathrm{p}=\) Particle's moment
