1
NEET 2021
+4
-1
Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres ($$\sigma$$1 / $$\sigma$$2) is :
A
$${{R_1^2} \over {R_2^2}}$$
B
$${{R_1^{}} \over {R_2^{}}}$$
C
$${{R_2^{}} \over {R_1^{}}}$$
D
$$\sqrt {\left( {{{{R_1}} \over {{R_2}}}} \right)}$$
2
NEET 2021
+4
-1
Twenty seven drops of same size are charged at 220V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
A
1980 V
B
660 V
C
1320 V
D
1520 V
3
NEET 2020 Phase 1
+4
-1
A short electric dipole has a dipole moment of 16 $$\times$$ 10-9 Cm. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of $$60^\circ$$ with the dipole axis is :

$$\left( {{1 \over {4\pi {\varepsilon _0}}} = 9 \times {{10}^9}N{m^2}/{C^2}} \right)$$
A
200 V
B
400 V
C
zero
D
50 V
4
NEET 2020 Phase 1
+4
-1
In a certain region of space with volume 0.2 m3, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is :
A
0.5 N/C
B
1 N/C
C
5 N/C
D
zero
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