Question # 1

For multiplication and division purposes, percentage uncertainties are:

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Add

subtracted

Multiplied

Divided

Wien's constant is measured in:

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Metre per kelviin

Metre kelvin

Kelvin per meter

Joules

Dynes

The drag force acting on a spherical droplet of radius 10^-5m moving with a velocity of 1 cm/sec in a fluid of velocity 5.31 x 10^-7m/sec. The units comes out to be:

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10^-16N

10^-14N

10^-12N

10^-10N

Alternating current is produced by a voltage source which polarity:

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Remains the same

Reverse after period T

Keeps on reversing with time

Reverse after every time interval T/2

Both (C) and (D)

Viscosity of water is ______ that of air but ___ that of plasma.

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More, more

Less, more

Less, less

More, less

Origin of the electric and the gravitational forces

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Was known in 1911 A.D.

Was known in 1811 A.D.

Was known in 1711 A.D.

is still unknown

Was known in 1611 A.D.

Computer chips are made from:

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Iron

Silicon

Helium

Stontium

Aluminium

The first series which was identified in the spectrum of hydrogen is called:

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Lyman series

Balmer series

Paschen series

Brackett series

Pfund series

Work has the dimension as that of:

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Torque

Angular momentum

Linear momentum

Power

The inside cavity of the black body is

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painted white

painted silver

blackened with soot

painted red

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

At the top of the trajectory of a projectile,the acceleration is

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The maximum

The minimum

Zero

g

Vector subtractions is made when vectors are just

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Added

First make it negative then add

Only make it negative

None of these

The vertical velocity component changes with

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Distance

Time

Height

Angle

The word fluid means

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To rise

To fall

To flow

To oppose

In uniform circular motion the angular acceleration vector is

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Constant in magnitude and direction both

Constant in magnitude only

Constant in direction only

Varies in magnitude and direction both

For the conversion of heat into work, the two bodies are essential as temperature which is

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Similar

Very little difference

Large difference

None of these

In an interference pattern of Young,s Double Slit (YDS) experiment

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Bright fringes are wider than dark fringes

Dark fringes are wider than bright fringes

Both dark and bright fringes are of equally spaced

Central fringes are wider than the outer fringes

Angular momentum has the same unit as

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Impulse x distance

Linear momentum x time

Work x frequency

Power x time

The apparent weight of tiger having mass 10 kg in lift which is ascending upward with an acceleration 1 metre per second square.(g = 10 ms^-2)

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50 N

80 N

100 N

110 N

The two electric charges originally 8 cm apart are brought closer together, until they are 2 cm apart the force between them is now greater by a factor

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2

4

8

16

Temperature remain constant the volume of given mass of a gas is inversely proportional to the pressure applied on it. it is called

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General gas law

Boyle's law

Charles law

None of these

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