Question # 1

During the upward motion of the projectile, the vertical component of velocity.

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Decreases

Increases

Remains constant

None of these

Which of the following is not thermo dynamical function?

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Enthalpy

Work done

Gibb's energy

Internal energy

All trigonometric functions (since, cosine tangent etc. ) are positive in:

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1st Quadrant

2nd Quadrant

3rd Quadrant

4th Quadrant

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

Neutron was discovered by

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Curie

Roentgen

Chadwick

Rutherford

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

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980 N

580 N

1380 N

Zero

The spectrum emitted from hydrogen filled discharge tube is:

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Line spectrum

Discrete spectrum

And spectrum

Absorption spectrum

Both (A) and (B)

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

Free electrons are

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tightly bound

fixed

loosely bound

tightly fixed

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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ON switch

off switch

function switch

none of these

Amplitude in SHM is equivalent to ______ in circular motion:

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Diameter

Radius

Circumference

None of these

In newton's rings see through the reflected light, centeral spo is:

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Bright

Dark

Either of the Two

None of these

The product of mass flow per second with velocity is

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Momentum

Acceleration

Force

Displacement

The refracting edge of the prism must be parallel to the axis of rotation of the telescope, so that the turn table is leveled using

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Screws of the spectrometer

Leveling screws

Turn table screw

None of these

What will be the ratio of the distance moved by a freely falling body from rest in 4^th and 5^th seconds of journey?

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4 : 5

7 : 9

16 : 25

1 : 1

Which one of the following phenomena is not explained by Huygen's construction of wavefront?

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Refraction

Reflection

Diffraction

Origin of spectra

In the phenomenon of interference, the bright and dark fringes are of

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Different width

Equal width

Dark fringes are thicker than bright

Nona of these

The drag force increases as the speed of the object

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Decreases

Increases

Decreases rapidly

None of these

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Initial velocity

Variable velocity

Instantaneous velocity

None of these

A lift is moving downwards at a very high constant speed. A passenger present inside the lift standing on a weighing machine would notice that his weight

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is shown as zero on the scale

becomes zero

remains constant at a value less than this real weight

remains the same as his real weight

When a silicon crystal is doped with a trivalent element, then the atom of the trivalent element is known as

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acceptor

donor

either of them

none of them

Ordinary light has components of vibration in

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One direction

Different direction

All directions

None of these

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