Assertion (A): The stream of water flowing at high speed from a garden hose, pipe tends to spread like a fountain when held vertically up but tends to narrow down when held vertically down.
Reason (R):In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant.
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Reason (R):In any steady flow of an incompressible fluid, the volume flow rate of the fluid remains constant.
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Equation of Continuity |
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Assertion (A): The total translational kinetic energy of all the molecules of a given mass of an ideal gas is 1.5 times the product of its pressure and volume.
Reason (R):The molecules of gas collide with each other and the velocities of the molecules change due to the collision.
Reason (R):The molecules of gas collide with each other and the velocities of the molecules change due to the collision.
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Kinetic Energy of an Ideal Gas |
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Assertion (A): The relation between u, v and f for the spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature.
Reason (R): The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.
Reason (R): The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Reflection at Spherical Surface |
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | In a meter bridge experiment null point for an unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by increasing the value of the standard resistance. |
| Reason (R): | Resistance of metal increases with an increase in temperature. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Wheatstone Bridge |
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Assertion (A): Forces acting between proton-proton (fpp), proton-neutron (fpn) and neutron-neutron (fnn) are such that
fpp < fpn <fnn
Reason (R): Electrostatic force of repulsion between two protons reduces net nuclear forces between them.
fpp < fpn <fnn
Reason (R): Electrostatic force of repulsion between two protons reduces net nuclear forces between them.
1. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Nuclear Binding Energy |
From NCERT
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Assertion (A): The magnetic moment 
of an electron revolving around the nucleus decreases with increasing principle quantum number (n)
Reason (R): The magnetic moment
of an electron revolving around the nucleus is inversely proportional to the principle quantum number (n)
of an electron revolving around the nucleus decreases with increasing principle quantum number (n) Reason (R): The magnetic moment
of an electron revolving around the nucleus is inversely proportional to the principle quantum number (n)1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Magnetic Moment |
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Assertion (A): A particle of mass M at rest decay into two particles of masses 
, having non-zero velocities will have ratio of de-Broglie wavelengths unity.
Reason (R): Here we cannot apply conservation of linear momentum.
, having non-zero velocities will have ratio of de-Broglie wavelengths unity. Reason (R): Here we cannot apply conservation of linear momentum.
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: De-broglie Wavelength |
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Assertion (A): To increase resolving power of a telescope, the aperture (α) of the objective should be large.
Reason (R): Resolving power of the telescope is given by
.
Reason (R): Resolving power of the telescope is given by
.1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Resolving Power of Optical Devices (OLD NCERT) |
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Assertion (A): If the frequency of the applied AC is doubled, then the power factor of a series R-L circuit decreases.
Reason (R):Power factor of series R-L circuit is given be
Reason (R):Power factor of series R-L circuit is given be
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Different Types of AC Circuits |
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Assertion (A): Above Curie temperature, a ferromagnetic material becomes paramagnetic.
Reason (R): When a magnetic material is heated to very high temperature, it loses its magnetic properties.
Reason (R): When a magnetic material is heated to very high temperature, it loses its magnetic properties.
1. If both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3. If Assertion is true but Reason is false.
4. If both Assertion and Reason are false.
Subtopic: Curie's Law and Hysteresis (OLD NCERT) |
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