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1

A proton was fired towards a positively charged plate located at a distance
x. As the proton reaches just close to the plate, it stops there. The surface
charge density of the plate is 4 x 10^-6 C/m ² If the proton was fired with the
initial kinetic energy of 85 eV, then what is the value of distance x?

1 1.88 x 10^-1 m
2 1.88x10^-2 m
3 1.88 x 10^-3 m
4 1.88 x 10^-4 m

2

When a paramagnetic substance is placed in a uniform magnetic field, the magnetic field lines

1 return back after striking the substance
2 pass through air without touching the substance
3 Prefer to pass through the substance rather than through space.
4 tend to move from stronger parts of the field to the weaker parts

3

In a single slit diffraction, first minima for red light of wavelength 699 nm coincide with the first maxima of a colour. What is the wavelength of the unknown colour?

1 633 nm
2 599 nm
3 533 nm
4 466 nm

4

What would be the possible number of elements if elements with principal quantum numbers 2 greater than 4 did not exist in nature?

1 49
2 52
3 55
4 61

5

Which of the following statements is incorrect with reference to the nuclear forces?

1 Nuclear forces can not be attractive
2 Nuclear forces are independent of charge
3 Nuclear forces do not obey inverse square law.
4 Nuclear forces come into picture up to distance of the order of a few Fermi.

6

The expression q1 + q2 = 0 signifies that

1 q1 and q2 are unequal charges having the same sign
2 q1 and q2 are equal charges
3 q1 and q2 are equal charges having the same sign
4 q1 and q2 are equal charges with opposite signs

7

When we rub a glass rod with silk, then

1 Mass of the glass rod increases
2 Mass of the glass rod decreases
3 Mass of silk decreases
4 Mass of the glass rod as well as the silk increases

8

A material in which electrons are tightly bound and cannot move freely at room temperature is called a/an

1 Semiconductor
2 Superconductor
3 Insulator
4 Conductor

9

Two stones of different masses are thrown vertically upward with same initial velocity. Which one will rise to a greater height?

1 Stone of lower mass
2 Stone of higher mass
3 Both will rise to the same height
4 Information given is insufficient

10 The kinematic equation of motion v = u+at is not applicable if :

1 displacement is not constant
2 motion is non-uniform.
3 acceleration is not constant
4 velocity is not constant

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