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This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: The uncertainty principle is significantly only for the microscopic particles and not for the macroscopic particles can be concluded by considering the following example. Let us consider a particle or an object of mass 1 milligram i.e. 10^-6 kg Then its uncertainty can be calculated as,

? x ? v = 6.626 10^-34 / 4x 3.14 $\times$ 10⁶

= 10^-28 m^-2 s^-1

Thus, the value obtained is negligible and insignificant for the uncertainty principle to be applied to this particle.

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: Given, m (mass) = 10g, v (speed) = 90 m/s and accuracy = 4%

Uncertainty in speed = $\frac{90\times 4}{100}=$  3.6 ms^-1

Uncertainty in position = h/4  πmΔv = 6.626 × 10^-34/4 × 3.14 × 10 × 3.6

=1.36 × 10^-33m

Given below is a list of some necessary documents required to be submitted for BA Geography admission:

• Passport Size Picture
• Class 10 and 12 marksheets
• ID Proof
• Adhaar Card
• Migration Certificate (Optional)
• Entrance Exam Scorecard (Optional)

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans:

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: We know that

λ= c/υ Given,

υ = 4.620 × 10¹⁴ Hz

Thus, λ= c/υ = (3.0 × 10⁸ m/s)/ (4.620×10¹⁴ Hz) = 649.4nm

This frequency falls under visible range

Yes, JK Business School offers a scholarship of INR 50,000 to its BBA students who take admission into the PGDM programme. This scholarship is a financial incentive and will be evenly adjusted across all fee installments during the PGDM course duration.

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: The wavelength is defined as the distance between two consecutive crests or troughs of a wave, and it is denoted by  l .

l = 4*2.16 pm = 8.64 pm

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: We have

λ = h/mv

Thus, the equation signifies that in order to have the same wavelength the electron should have higher velocity as the mass of the proton is higher than that of the electron

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: The line spectrum associated with any element possesses lines corresponding to specific wavelengths and these lines are obtained as a result of electronic transitions between the energy levels. Hence, the electrons in these levels have fixed energy i.e., quantized values.

June 8 was the deadline to submit AIAPGET 2025 application form. Candidates have to register online and submit application form for exam. Registration for exam had started on May 9, 2025. Correction window to modify incorrect details uploaded with AIAPGET 2025 form was opened from June 10 to June 12, 2025. The exam was held on July 4, 2025. 

This is a Short Answer Type Questions as classified in NCERT Exemplar

Ans: As per de Broglie, every object in motion has a wave character i.e. every object/matter have dual nature both particle and wave nature. But the wavelengths associated with ordinary objects are so short (because of their large masses) that their wave properties cannot be detected.

Given, m (mass) = 100g, v=100km/hr

 We have

λ = h/mv= 238.5 × 10-³⁴ m

As the wavelength associated with the cricket ball is so small that it can’t be detected.

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