Diffraction pattern of a single slit consists of a central bright band which is:

1.  wide, and is flanked by alternate dark and bright bands of decreasing intensity

2.  narrow, and is flanked by alternate dark and bright bands of equal intensity

3.  wide, and is flanked by alternate dark and bright bands of equal intensity

4.  narrow and is flanked by alternate-dark and bright bands of decreasing intensity

Subtopic: Electric Potential |

1. Both assertion and reason are true and reason is the correct explanation of assertion

Q43:

Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.

Assertion (A) Soldiers are asked to break steps while crossing the bridge.

Reason (R) The frequency of matching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge.

2. Both assertion and reason are true but reason is not the correct explanation of assertion

Subtopic: Simple Harmonic Motion |

1. Both assertion and reason are true and reason is the correct explanation of assertion

Q44:

Assertion (A) The positively charged nucleus of an atom has a radius of almost 10^-15 m

Reason (R) In α-particles scattering experiment, the distance of closest approach for α-particles is \(\approx 10^{-15} \mathrm{~m}\)

1. Both assertion and reason are true and reason is the correct explanation of assertion

2. Both assertion and reason are true but reason is not the correct explanation of assertion

3. Assertion is true but reason is false

4. Both assertion and reason are false

Subtopic: Various Atomic Models |

From NCERT

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Q45:

Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.

Assertion (A) A ladder is more apt to slip, when you are high up on it, then when you just begin to climb.

Reason (R) At the high up on a ladder, the torque is large and on climbing up the torque is small.

2. Both assertion and reason are true but reason is not the correct explanation of assertion

1. Both assertion and reason are true and reason is the correct explanation of assertion

Q46:

Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.

Assertion (A) In an adiabatic process change in internal energy of a gas in equal to work done on or by the gas in the process.

Reason (R) Temperature of gas remains constant in an adiabatic process.

2. Both assertion and reason are true but reason is not the correct explanation of assertion

Subtopic: Types of Processes |

1. Both assertion and reason are true and reason is the correct explanation of assertion

Q47:

Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.

Assertion (A) An inductance and a resistance are connected in series with an AC circuit. In this circuit, the current and the potential difference across the resistance logs behind potential difference across the inductance by an angle

.

Reason (R) In L-R circuit, voltage leads the current by phase angle which depends on the value of inductance and resistance both.

2. Both assertion and reason are true but reason is not the correct explanation of assertion

Subtopic: LR circuit |