1
NEET 2017
MCQ (Single Correct Answer)
+4
-1
A capacitor is charged by a battery. The battery is removed and another identical unchanged capacitor is connected in parallel. The total electrostatic energy of resulting system
A
decreases by a factor of 2
B
remains the same
C
increases by a factor of 2
D
increases by a factor of 4
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
The diagrams below show regions of equipotentials.

NEET 2017 Physics - Electrostatics Question 64 English
A positive charge is moved from A to B in each diagram.
A
In all the four cases the work done is the same.
B
Minimum work is required to move q in figure(I).
C
Maximum work is required to move q in figure (II).
D
Maximum work is required to move q in figure (III)
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
The resistance of a wire is 'R' ohm. If it is melted and stretched to 'n' times its original length. its new resistance will be
A
$${R \over n}$$
B
n2R
C
$${R \over {{n^2}}}$$
D
nR
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
A potentiometer is an accurate and versatile device to make electrical measurements of EMF because the method involves
A
potential gradients
B
a condition of no current flow through the galvanometer
C
a combination of cells, galvanometer and resistances
D
cells
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