Question # 1

A fluid at a certain point has 50 J of potential energy per unit volume, 75 J of kinetic energy per unit volume,and 35 J of pressure energy per unit volume. the total energy of the fluid is

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125 J

90 J

160 J

85 J

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

The body passing a viscous medium affected by:

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One force only

Two forces only

Four forces

None of these

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

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9.8

24 x 10¹⁹

24 x 10⁴²

24 x 10^-44

Two point charges A and B separated by a distance R attract each other with a force of 12 x 10^-3N. The force between A and B when the charges on them are doubled and distance is halved

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1.92 N

19.2 N

12 N

0.192 N

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

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F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be

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low

zero

high

all of them

The unit of resistivity is

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ohm

ohm-m²

ohm-meter

ohm-m^-1

The entity which measures the quantity of motion in a body is called

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force

energy

momentum

power

The chemical behaviour of an atom is determined by

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binding energy

atomic number

mass number

number of isotopes

Flurescent screen is a screen where visible spot

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vanishes

is made

becomes small and large

none of these

The potential difference across the conductors should be maintained constant by connecting the ends of wire to the terminal of a device called a source of

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power

current

resistance

temperature

The force which maintain the strict long-range order between atoms of a crystalline solid is the:

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Nuclear force

Cohesive force

Adhesive force

Coulomb force

None of these

The values 1 and 0 are designated as:

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Continuous values

Binary values

Boolean values

Decimal values

Either (B) and (C)

The emf is measured in:

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Newton

Volt

J/C

Both A and B

Both B and C

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms^-1then velocity at second cross-section is

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5000 cms^-1

500 cms^-1

50 cms^-1

0.5 cm/s

Heat travels through vacuum by

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Conduction

Convection

Radiation

Both A and B

A current carrying conductor sets up its own:

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Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

Which of the following material has smaller has life

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uranium

polonium

radium

radian

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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adiabatically

isothermally

isochorically

isobarically

Recently a complex crystalline structure known as Yetrium Barium Copper Oxide have been reported to become superconductor at

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125 K

25 K

263 K

163 K

The energy stored in a charge capacitor

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1/2CV²

1/2C²V

1/2C/V²

None of these

The number if neutrons in the nucleus of ₉₂U²³⁵are

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Infinite

92

235

143

The gavanometer constant of a moving coil galvanometer is given by

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K=BAN/C

K=BN/CA

K=NAC/B

K=C/BAN

The output voltage of half wave rectification is in the form of

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a smooth curve

a smooth wave

pulses

all of the above

The earth’s potential and potential at infinity are taken:

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Equal

Zero

First is greater than the second

Second is greater than the first

Both (A) and (B)

When weight of an object falling freely becomes equal to the drag force, then the body will move with

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increasing speed

decreasing speed

constant speed

none of them

Alternating current can induce voltage because it has a

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High peak value

Varying magnetic field

Stronger field than direct curren

Constant magnetic field

When the p-n junction is forward biased its resistance is of the order of

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few mega ohms

few kilo ohms

few ohms

few milli ohms

When certain area A is held parallel to the field lines, then:

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No lines cross this area

Maximum lines pass through this area

The number of lines are between zero and maximum

Both (A) and (B) correct

None of these

Kirchhoff's first rule is also called:

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Loop rule

Thumb rule

Point rule

Right hand rule

None of these

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