Question # 1

The liquid which conduct current is known as

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heating effect

chemical energy

electrolyte

ohm's law

Examples of crystalline solids are:

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Cooper

NaCl

Zirconia

Both (A) and (B)

All of these

If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity

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v/A = constant

A/v = constant

Av = constant

None

When the shear stress and shear stain are involved, then their ratio is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

From sand, we get a material used for construction of computer chips. That material is called:

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Germanium

Silicon

Copper

Lead

It two waves of amplitude 'a' produce a resultant wave of amplitude a, then the phase difference between them will be

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60°

90°

120°

180°

Current provided by a battery is maximum when

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Internal resistance equal to external resistance

Internal resistance is greater than external resistance

Internal resistance is less then external resistance

None of these

A man sitting in a bus travelling in a direction from west to east with a speed of 40 km/h observes that the rain drops are falling vertically down. To the another man standing on ground the rain will appear

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To fall vertically down

To fall at an angle going from west to east

To fall at an angle going from east to west

The information given is insufficient to decide the direction of rain

To hear a clear echo, the reflecting surface must be at a minimum distance of

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10 m

16.5 m

33 m

66 m

Cause of heat production in a current carrying conductor is

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Collisions of free electrons with one another

High drift speed of free electrons

Collisions of free electrons with atoms or ions of conductor

High resistance value

The branch of physics which deals with the properties of fundamental particles is called:

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High energy physics

Molecular physics

Astrophysics

Space physics

The horizontal component of a force at an angle 60° with it is 50N. The value of force is

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43.3 N

50 N

100 N

120 N

The conventional source of energy is

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Geothermal energy

Solar energy

Hydroelectric energy

None of these

Significant figure in 0.00110

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One

Two

Three

Four

Who devise the experimental arrangement in 1801 for studying interference effects of light

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Huygen

Young

Newton

None of these

The whole range of colour printing uses just

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4 colours

3 colours

2 colours

Red, blue, gray

In Huygen's wave theory the locus of all points in the same state of vibration is called

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A half-period zone

Vibrator

Wave front

A ray

The optical fibre is covered for protection with

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rubber jacket

plastic jacket

steel jacket

copper jacket

A body of mass m is falling downward in a viscous medium with terminal velocity v net force on the body is

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mg

mg-6πηrv

6πηrv-mg

Zero

A collision is said to be elastic during this collision

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K.E of the system remains conserved

momentum of the system remains conserved

total energy of the system remains conserved

all of them

Time of flight of a body in projectile is the time in which a body

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Remains in the air

It reaches maximum height

The velocity becomes zero

None of these

The relation Cp > Cv by an amount equal to

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Gas constant

Universal gas constant

Both

None of these

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