1
MHT CET 2021 21th September Evening Shift
+1
-0

When a piece of polythene is rubbed with wool, a negative charge of $$4 \times 10^{-7} \mathrm{C}$$ is developed on the polythene. The number of electrons transferred from wool to polythene is $$[e=1.6 \times\left.10^{-19} \mathrm{C}\right]$$

A
$$1.5 \times 10^{12}$$
B
$$3.5 \times 10^{13}$$
C
$$2.5 \times 10^{13}$$
D
$$2.5 \times 10^{12}$$
2
MHT CET 2021 21th September Evening Shift
+1
-0

A hollow metal sphere has a radius 'r'. The potential difference between a point on its surface and at a point at a distance '3r' from its centre is 'V'. The electric intensity at the distance '3r' from the centre of the sphere will be :

A
$$\mathrm{\frac{V}{3r}}$$
B
3Vr
C
$$\mathrm{\frac{V}{r}}$$
D
$$\mathrm{\frac{V}{6r}}$$
3
MHT CET 2021 21th September Morning Shift
+1
-0

'$$\mathrm{F}$$' is the force between the two identical charged particles placed at a distance '$$\mathrm{Y}$$' from each other. If the distance between the charges is reduced to half the previous distance then force between them becomes

A
$$\frac{F}{4}$$
B
$$4 \mathrm{~F}$$
C
$$2 \mathrm{~F}$$
D
$$\frac{\mathrm{F}}{2}$$
4
MHT CET 2021 20th September Evening Shift
+1
-0

A uniformly charged semicircular arc of radius '$$r$$' has linear charge density $$(\lambda)$$, is the electric field at its centre? ( $$\in_0=$$ permittivity of free space)

A
$$\frac{\lambda}{4 \epsilon_0 r}$$
B
$$\frac{2 \pi \epsilon_0}{\lambda}$$
C
$$\frac{\lambda}{4 \epsilon_0}$$
D
$$\frac{2 \epsilon_0}{\lambda}$$
MHT CET Subjects
Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
Physical Chemistry
Inorganic Chemistry
Organic Chemistry
Mathematics
Algebra
Trigonometry
Calculus
Coordinate Geometry
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