1
COMEDK 2024 Evening Shift
+1
-0

If 216 drops of the same size are charged at $$200 \mathrm{~V}$$ each and they combine to form a bigger drop, the potential of the bigger drop will be

A
2400 V
B
7200 V
C
1200 V
D
8200 V
2
COMEDK 2024 Evening Shift
+1
-0

Three point charges are located on a circular arc at $$\mathrm{A}, \mathrm{B}$$ and $$\mathrm{C}$$ as shown in the figure below. The total electric field at the centre of the $$\operatorname{arc}(\mathrm{C})$$ is

A
$$15000 \mathrm{~NC}^{-1}$$
B
$$10000 \mathrm{~N} \mathrm{C}^{-1}$$
C
$$20000 \mathrm{~NC}^{-1}$$
D
$$5000 \mathrm{~NC}^{-1}$$
3
COMEDK 2024 Morning Shift
+1
-0

A square shaped aluminium coin weighs $$0.75 \mathrm{~g}$$ and its diagonal measures $$14 \mathrm{~mm}$$. It has equal amounts of positive and negative charges. Suppose those equal charges were concentrated in two charges $$(+Q$$ and $$-Q)$$ that are separated by a distance equal to the side of the coin, the dipole moment of the dipole is

A
$$34.8 \mathrm{~Cm}$$
B
$$3.48 \mathrm{~Cm}$$
C
$$3480 \mathrm{~Cm}$$
D
$$348 \mathrm{~Cm}$$
4
COMEDK 2024 Morning Shift
+1
-0

If potential (in volt) in a region is expressed as $$\mathrm{V}(\mathrm{x}, \mathrm{y}, \mathrm{z})=6 \mathrm{xy}-\mathrm{y}+2 \mathrm{yz}$$, the electric field (in $$N C^{-1}$$) at point $$(1,0,1)$$ is

A
$$\mathrm{-7 j}$$
B
$$+7 \mathrm{j}$$
C
$$\mathrm{-6 i+7 j}$$
D
$$\mathrm{6 i-7 j}$$
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Medical
NEET