1
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
In a guitar, two strings A and B made of same material are slightly out of tune and produce beats of frequency 6 Hz. When tension in B is slightly decreased, the beat frequency of A is 530 Hz, the original freqnency of B will be :
A
524 Hz
B
536 Hz
C
537 Hz
D
523 Hz
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
Two bodies of mass 4 kg and 6 kg are tied to the ends of a massless string. The string passes over a pulley which is frictionless (see figure). The acceleration of the system in terms of acceleration due to gravity (g) is :
NEET 2020 Phase 1 Physics - Laws of Motion Question 7 English
A
g/2
B
g/5
C
g/10
D
g
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The capacitance of a parallel plate capacitor with air as medium is 6$$\mu $$F. With the introduction of a dielectric medium, the capacitance become 30 $$\mu $$F The permittivity of the medium is :
$$\left( {{\varepsilon _0} = 8.85 \times {{10}^{ - 12}}{C^2}{N^{ - 1}}{m^{ - 2}}} \right)$$
A
$$1.77 \times {10^{ - 12}}{C^2}{N^{ - 1}}{m^{ - 2}}$$
B
$$0.44 \times {10^{ - 10}}{C^2}{N^{ - 1}}{m^{ - 2}}$$
C
$$5.00{C^2}{N^{ - 1}}{m^{ - 2}}$$
D
$$0.44 \times {10^{ - 13}}{C^2}{N^{ - 1}}{m^{ - 2}}$$
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes :
A
half
B
four times
C
one-fourth
D
double
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