A square loop with a side length of \(1~\text m\) and resistance of \(1~\Omega\) is placed in a uniform magnetic field of \(0.5~\text T.\) The plane of the loop is perpendicular to the direction of the magnetic field. The magnetic flux through the loop is:
1. zero
2. \(2\) Wb
3. \(0.5\) Wb
4. \(1\) Wb
Subtopic: Magnetic Flux |
68%
From NCERT
NEET - 2022
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An electric lift with a maximum load of \(2000\) kg (lift+passengers) is moving up with a constant speed of \(1.5\) ms–1. The frictional force opposing the motion is \(3000\) N. The minimum power delivered by the motor to the lift in watts is:
(Take \(g=10\) ms–2)
1. \(23500\)
2. \(23000\)
3. \(20000\)
4. \(34500\)
(Take \(g=10\) ms–2)
1. \(23500\)
2. \(23000\)
3. \(20000\)
4. \(34500\)
Subtopic: Power |
65%
From NCERT
NEET - 2022
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A light ray falls on a glass surface of refractive index \(\sqrt{3}\), at an angle of \(60^\circ.\) The angle between the refracted and reflected rays would be:
| 1. | \(120^\circ\) | 2. | \(30^\circ\) |
| 3. | \(60^\circ\) | 4. | \(90^\circ\) |
Subtopic: Refraction at Plane Surface |
62%
From NCERT
NEET - 2022
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A copper wire of length \(10\) m and radius \(\left({10^{-2}/\sqrt{\pi}}\right)\) m has an electrical resistance of \(10~\Omega.\) The current density in the wire for an electric field strength of \(10\) (V/m) is:
1. \(10^{5}\) A/m2
2. \(10^{4}\) A/m2
3. \(10^{6}\) A/m2
4. \(10^{-5}\) A/m2
1. \(10^{5}\) A/m2
2. \(10^{4}\) A/m2
3. \(10^{6}\) A/m2
4. \(10^{-5}\) A/m2
Subtopic: Current & Current Density |
68%
From NCERT
NEET - 2022
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In the given circuits \((a),\) \((b),\) and \((c),\) the potential drop across the two \({\mathrm{p\text-n}}\) junctions is equal in:
| 1. | both circuits \((a)\) and \((c)\) |
| 2. | circuit \((a)\) only |
| 3. | circuit \((b)\) only |
| 4. | circuit \((c)\) only |
Subtopic: PN junction |
65%
From NCERT
NEET - 2022
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If the initial tension on a stretched string is doubled, then the ratio of the initial and final speeds of a transverse wave along the string is:
1. \(1:2\)
2. \(1:1\)
3. \(\sqrt{2}:1\)
4. \(1:\sqrt{2}\)
1. \(1:2\)
2. \(1:1\)
3. \(\sqrt{2}:1\)
4. \(1:\sqrt{2}\)
Subtopic: Travelling Wave on String |
71%
From NCERT
NEET - 2022
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The ratio of the radius of gyration of a thin uniform disc about an axis passing through its centre and normal to its plane to the radius of gyration of the disc about its diameter is:
| 1. | \(1:\sqrt{2}\) | 2. | \(2:1\) |
| 3. | \(\sqrt{2}:1\) | 4. | \(4:1\) |
Subtopic: Moment of Inertia |
68%
From NCERT
NEET - 2022
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In Young's double-slit experiment, a student observes \(8\) fringes in a certain segment of the screen when a monochromatic light of \(600\) nm wavelength is used. If the wavelength of light is changed to \(400\) nm, then the number of fringes he would observe in the same region of the screen is:
1. \(12\)
2. \(6\)
3. \(8\)
4. \(9\)
1. \(12\)
2. \(6\)
3. \(8\)
4. \(9\)
Subtopic: Young's Double Slit Experiment |
77%
From NCERT
NEET - 2022
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The angle between the electric lines of force and the equipotential surface is:
1. \(180^\circ\)
2. \(0^\circ\)
3. \(45^\circ\)
4. \(90^\circ\)
1. \(180^\circ\)
2. \(0^\circ\)
3. \(45^\circ\)
4. \(90^\circ\)
Subtopic: Equipotential Surfaces |
82%
From NCERT
NEET - 2022
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A spherical ball is dropped into a long column of a highly viscous liquid. The graph that represents the speed of the ball \((v)\) as a function of time \((t)\) is:
| 1. | \(D\) | 2. | \(A\) |
| 3. | \(B\) | 4. | \(C\) |
Subtopic: Viscosity |
73%
From NCERT
NEET - 2022
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