Question # 1

When the medium is insulator the elecrostatic force between the charges is

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Decreased

Zero

Increased

None of above

The solids are classified as

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Polymeric

Amorphous

Crystalline

All of above

Anti particle of electron is

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Proton

Photon

Neutron

Positron

A wire stretched to double of its length, its strain is:

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2

1

0

0.5

Laser is a beam of light which is

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Monochromatic

Coherent

Unidirectional

All of these

In three phase A.C. generator the phase difference between each pair of coil is.

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45^o

90^o

120^o

60^o

In Pakistan the frequency of A.C. supply is.

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50 Hz

60 Hz

45 Hz

70 Hz

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

The phase angle of a series RLC circult at resonant frequency is

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1/2

sigma

Zero

sigma /4

___ is correct relation.

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IT = 10^-4G

IT = 10⁴ G

IT = 10² G

IT = 10^-2 G

The most refined form of matter is:

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Smoke

Light

Ice

Fog

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

The output of two input is zero only when its.

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Both inputs are zero

Either input is zero

Both inputs are one

Either input is one

The electric field created by positive charge is

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Radially inward

Zero

Circular

Radially outward

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

A photon while passing thorugh a magnetic field are deflected towards:

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North pole

South pole

Are ionized

None of these

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