1
MHT CET 2021 22th September Morning Shift
+1
-0

A point charge $$\mathrm{Q}$$ is placed at the centre of the line joining two equal point charges $$+\mathrm{q}$$ and $$+\mathrm{q}$$. The value of $$Q$$ if the system of the charges is in equilibrium, is

A
$$\frac{-q}{2}$$
B
$$-\frac{9}{4}$$
C
$$\frac{+q}{4}$$
D
$$\frac{+q}{2}$$
2
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
$$2.5 \times 10^{12}$$
3
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
$$\mathrm{\frac{V}{6r}}$$
4
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
$$\frac{\mathrm{F}}{2}$$
EXAM MAP
Medical
NEET