Question # 1

Electrostatics is the branch of physics which deals with the study of electro charges:

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At rest

At rest under the action of electric forces

In motion under the action of electric forces

In motion

At rest under the action of nuclear forces

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

The SI unit of electric flux is

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Weber

Nm²C^-1

NmC^-1

Nm^-2C

X-ray are also known as

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Roentgen rays

Maxwell rays

Plank range

Einstein rays

Which of the following quantity for particle executing SHM is non-zero at mean position

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Force

Acceleration

Velocity

Displacement

When two protons are brought are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

The valence band of an atom in a solid

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is always empty

may or may not be empty

can never be empty

none of them

Conversion of alternating current into direct current is called

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amplification

rectification

conduction

polarization

Which one of the following is correct?

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V_o= 1.414 V_rms

I_ams= 1.414 I_o

VO = 10.70 Vrms

Both a and b

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

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Refraction

Reflection

Diffraction

Formation of spectrum

A women of 50 kg distributes her wright equally over high-heeld shoes. Each heel has an area of 0.75 cm². The pressure exerted by each heel will be

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6.66 x 10⁶ Pa

3.33 x 10⁶ Pa

1.67 x 10⁶ Pa

3.33 x 10^-6 Pa

The bending of light when it passes from one medium to another is known as

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Refraction

Interference

Polarization

Diffraction

A telescope is rotatable about the same vertical axis as the turntable, with a scale which is

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Main scale

Vernier scale

Half degree scale

None of these

As we go above the surface of earth the value of 'g'

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Increase

Remain Constant

Decrease

Increase slightly

Electric intensity inside a hollow sphere is

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Minimum

Maximum

q / c_o

Zero

Capacitor is a device use to store the

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A.C. current

D.C. current

Charge

Voltage

Assuming the earth to be a sphere of radius 6400 km. What is the value of acceleration due to gravity at a height of 800 km above the surface of the earth ?

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5.35 ms^-1

6.35 ms^-2

7.35 ms^-2

8.35 ms^-2

At the maximum height the V_f is

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_Constant

Zero

Maximum

None of these

Fast moving atomic particles, accelerated in an accelerator are applicable to the new branch of Physics is

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Newtonian mechanics

Relativistic mechanics

Classical mechanics

None of these

Bulk modulus for glass is

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2

31

36

42

When a stress changes the shape, it is called the

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compressional stress

tensile stress

shear stress

any one of them

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