Question # 1

The angle of deflection of coil can be measured by the

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one method

three method

two method

none of these

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

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Helium

Neon

Both

None of these

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

The relationship between Boltzmann constant k with R and N_Ais given as:

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k = RN_A

k =R/N_A

k = NR/N_A

None of these

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

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45 V

15 V

90 V

300 V

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

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4/5Ω

5/4Ω

20Ω

0.05 Ω

The density of blood is nearly equal to that of

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mercury

sodium

water

honey

The maximum displacement of a body on either side of its equilibrium position is called

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frequency

amplitude

displacement

time period

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

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C

C/2

Zero

2C

When a stress changes the shape, it is called the

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compressional stress

tensile stress

shear stress

any one of them

In AND gate, the output is 1 if:

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Both inputs are 0

Both inputs are 1

Only one input is 0

Both (A) and (B)

Both (A) and (C)

The mass of electrons in Me V is

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1.02 Mev/C²

0.51 Mev/C²

51 Mev/C²

102 Mev/C²

A radioactive isotope 𝟐𝟑𝟖 𝑼 decays consecutively to 𝟐𝟑𝟒 𝑼 the particles emitted are:

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One 𝛼 and one 𝛽

Two 𝛼 and one 𝛽

e 𝛼 and two 𝛽

Two 𝛼 and two 𝛽

Domains are present only in

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Diamagnetic material

Para magnetic material

Ferromagnetic material

All of these

Which of the following statements about angular momentums is correct?

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Angular momentum remains conserved

Angular momentum is the product of moment of inertia and angular velocity

Moment of inertia is directly proportional to angular momentum for constant angular speed

All of these

The process of doping causes resistivity of semiconductor to

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Increase

Decrease

Same

Become zero

Plane polarized light can be produced by:

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Simple reflection

Refraction

Selective absorption

All of these

Newtons first law of motion says a body will

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Remains at rest

Continuous move to with uniform velocity

Have no unbalanced external force act

All of these

After terminal velocity is reached, the acceleration of a body falling through a viscous fluid is

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More than g

Less than g

Equal to g

Zero

The phenomenon of geothermal energy is a geyser. It is a hot spring that discharges

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Steam

Hot water

Both

None of these

Two row boats moving parallel in the same direction and pulled toward each other due to the application of Bernoulli's equation

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Stake's theorem

Toricelli's theorem

Venturi relation

None of these

To wavelength of light by his experiment , Newton utilized:

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Wavelength of light

Intensity of light

amplitude wave

None of above

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