1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Six charges +q, $$-$$q, +q, $$-$$q, +q, and $$-$$q are fixed at the corners of a hexagon of side d as shown in the figure. The work done in bringing a charge q0 to the centre of the hexagon from infinity is

($${\varepsilon _0}$$ - permittivity of free space)

NEET 2022 Phase 2 Physics - Electrostatics Question 7 English

A
$${{ - {q^2}} \over {4\pi {\varepsilon _0}d}}\left( {6 - {1 \over {\sqrt 2 }}} \right)$$
B
Zero
C
$${{ - {q^2}} \over {4\pi {\varepsilon _0}d}}$$
D
$${{ - {q^2}} \over {4\pi {\varepsilon _0}d}}\left( {3 - {1 \over {\sqrt 2 }}} \right)$$
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

An astronomical refracting telescope is being used by an observer to observe planets in normal adjustment. The focal lengths of the objective and eye piece used in the construction of the telescope are 20 m and 2 cm respectively. Consider the following statements about the telescope :

(a) The distance between the objective and eye piece is 20.02 m

(b) The magnification of the telescope is ($$-$$) 1000

(c) The image of the planet is erect and diminished

(d) The aperture of eye piece is smaller than that of objective

The correct statements are :

A
(a), (b) and (d)
B
(a), (b) and (c)
C
(b), (c) and (d)
D
(c), (d) and (a)
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

The magnetic flux linked to a circular coil of radius R is

$$\phi = 2{t^3} + 4{t^2} + 2t + 5$$ Wb

The magnitude of induced emf in the coil at t = 5 s is

A
192 V
B
108 V
C
197 V
D
150 V
4
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1

Three vessels of equal capacity have gases at the same temperature and pressure. The first vessel contains helium (monoatomic), the second contains fluorine (diatomic) and the third contains sulfur hexafluoride (polyatomic). The correct statement, among the following is :

A
The root mean square speed of sulfur hexafluoride is the largest
B
All vessels contain unequal number of respective molecules
C
The root mean square speed of molecules is same in all three cases
D
The root mean square speed of helium is the largest
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