1
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A screw gauge gives the following readings when used to measure the diameter of a wire

Main scale reading : 0 mm

Circular scale reading : 52 divisions

Given that 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is :
A
0.052 cm
B
0.52 cm
C
0.026 cm
D
0.26 cm
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
Find the value of the angle of emergence from the prism. Refractive index of the glass is $$\sqrt 3 $$

NEET 2021 Physics - Geometrical Optics Question 15 English
A
90$$^\circ$$
B
60$$^\circ$$
C
30$$^\circ$$
D
45$$^\circ$$
3
NEET 2021
MCQ (Single Correct Answer)
+4
-1
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the first cell, then at what length of the wire, the balance point occurs?
A
62 cm
B
60 cm
C
21.6 cm
D
64 cm
4
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of earth and the speed of the particle at that instant are respectively -
A
$${S \over 4},\sqrt {{{3gS} \over 2}} $$
B
$${S \over 4},{{3gS} \over 2}$$
C
$${S \over 4},{{\sqrt {3gS} } \over 2}$$
D
$${S \over 2},{{\sqrt {3gS} } \over 2}$$
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