Question # 1

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

The SI unit of electric field intensity is

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CN^-1

NC^-1or Vm^-1

JC^-1

AV^-1

The unit of work function is:

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Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

Electric generators which convert mechanical energy into

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solar energy

thermal energy

kinetic energy

electrical energy

Choose the set of physical quantities, which have both numerical and directional properties:

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Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

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21 x 10³+ 10%

23 x 10¹+ 10%

21 x 10³+ 5%

12 x 10³+ 5%

Which one of the following is an example of SHM:

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Motion in a plane

Motion in a swing

Motion in a car

None of these

Which of the following theory completely explain the three types of materials

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Bohr model of electron distribution

Rutherford atomic model

Pauli's exclusion principle

energy band theory

In a soft iron, domains are

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easily oriented along external field and do not return to original random positions

easily oriented along external field and readily returns to originally random position

do no oriented along external field and also do not returns to originally random position

none of them

Which quantity is important in stating the entropy of the system

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initial entropy

final entropy

change in entropy

none of them

Which of the following is not an example of adiabatic process

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the rapid escape of air from a burst type

the rapid expansion and compression of air through which a sound wave is passing

cloud formation in the atmosphere

none of them

The maximum kinetic energy of emitted photoelectrons depends upon:

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The intensity of incident light

Frequency of the incident light

Temperature of the surface

All of above

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be

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6 x 10^-5rad

7 x 10^-5rad

8 x 10^-5rad

None of these

A device which convert DC into AC is calleD)

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Invertor

Generator

Rectifier

Motor

One light year = ______.

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9.5 x 10^-15m

9.5 x 10¹⁵m

9.5 x 10^-12m

9.5 x 10¹²m

The siemens is the SI unit of

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Resistance

Specific Resistance

Conductance

Inductance

George Stoke found the effect of viscous drag on small sphere falling through liquids in

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1782

1851

1902

1947

Finger prints on paper are identified by sprinkling fluorescent powder on it and observing it under

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Sun light

Sodium light

Infrared

UV

Coulomb's force is also

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Single force

Mutual force

Self force

None of these

The escape velocity for the surface of moon is

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9.8 km/sec

11 km/sec

2.4 km/sec

2.9 km/sec

The volume of liquid flowing per second out of an orifice at the bottom of a tank does not depend upon

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The area of the orifice

The height of liquid above the orifice

The density of liquid

Both A and C

Viscosity of air is

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0.019x10³ Nsm^-2

0.019x10^-3 N-sm^-2

0.019x10³ Nsm^-2

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