Question # 1

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

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zero

small

large

very large

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 unit of magnetic flux is

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Weber-m²

Weber-m³

Henry

Weber

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

Gaussian surface is always:

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Rectangular

Spherical

Cylindrical

Box shape

Any of these

A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is

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Moving forward and gaining speed

Moving forward and losing speed

Moving forward with uniform speed

Moving backward with uniform speed

The fractional change in resistance per kelvin is known as

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temperature coefficient

resistance coefficient

super temperature

critical temperature

Michael Faraday and Joseph Henry belong respectively to

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USA and England

England and France

England and USA

USA and France

None of these

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

In solids, only following type/s of wave can travel:

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Transverse

Longitudinal

Both A and B

None of them

The waves in which the particles of the medium are displaced in a direction perpendicular to the direction of propagation of waves are known as

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longitudinal waves

transverse waves

non-mechanical waves

none of them

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

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81 K

355 K

627 K

627°C

When a water droplet falls through air, the net force on it is

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Net force = drag force - weight

Net force = weight - drag force

Net force = drag force + weight

Net force = weight + drag force

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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nuclear fission

nuclear fusion

man defect

radioactivity

The Einstein's changes in length, mass and time are not observed in common life because

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We dont observer then seriously

The masses are too large

Their speed is too small than the speed of right

All of the above

If rope of lift breaks suddenly. The tension exerted by the surface of lift is (a=Acceleration of lift)

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mg

m (g+a)

m (g - a)

0

Where the streamlines are very far apart from each other, the pressure will be

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low

zero

high

all of them

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

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Q=V/C

Q=C/V

Q=1/2CV

Q=CV

The number of LED'S needed to display all the digits is:

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Four

Five

Nine

Six

Seven

The most common source of alternating voltage is:

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Motor

Transformer

AC genrator

Both (A) and (C)

Both (A) and (B)

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

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One coulomb

0.5 coulomb

30 coulomb

2 coulombs

None of these

In case of the three dimensional deformation, when volume is involved, the ratio of applied stress to volumetric strain is called

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Young's modulus

Bulk modulus

Shear modulus

all of them

The curve representing an isothermal process is called

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adiabat

isotherm

fixed temperature

none of them

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

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

The number of isotopes of hydrogen are

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2

1

3

4

Selenium is:

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An insulator

A conductor

Insulator in the dark and becomes conductor when exposed to light

Conductor in the dark only

None of these

At O° K which of the following properties of a gas will be zero?

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Kinetic energy

Potential energy

Vibrational energy

Density

According to kinetic theory of gases, molecules of a gas behave like

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Inelastic spheres

Perfectly elastic rigid sphere

Perfectly elastic non-rigid spheres

Inelastic non-rigid spheres

Two sources of sound are said to be coherent if

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The produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

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