Question # 1

Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is

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11.0 ohm

1.0 ohm

7.0 ohm

3.0 ohm

The closed loop gain of the inverting amplifier is written as

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G = R₂/R₁

G = 1 + R₂/R₁

G = -R₂/R₁

G = 1 - R₂/R₁

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

An example of photoconductor is:

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Boron

Carbon

Iron

Aluminum

Selenium

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

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

Which of the following medium/media can transmit both transverse and longitudinal waves:

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Solids

Liquids

Gases

All of them

Which is modified form of galvanometer

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potentiometer

battery

voltmeter

slide wire bridge

Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become

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Zero

F/2

F

2F

The basic circuit elements of A.C circuit are

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Resistor

Inductor

Capacitor

All the three

The waves which propagate through the oscillations of material particles are known as:

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Mechanical waves

Electromagnetic waves

Any of them

None of them

The arrangement or molecules or atoms in a crystalline solid can be studied by using:

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Chemical methods

Neutrons

X-ray techniques

Copper atoms

Both (A) and (B)

The phenomenon of generation of induced emf is called

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Electrostatic induction

Magnetic induction

Electromagnetic induction

Electric induction

Both (A) and (D)

The way through which electromagnetic radiations or photons interact with matter depends upon their:

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Wavelength

Frequency

Energy

Temperature

All of these

The unit of thermodynamical scale is

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centigrade

fahrenheit

kelvin

none of them

In a semi-conductor material, the total current is

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only the +ve current

only the electronic current

sum of +ve and electronic current

all of them

A 5 kg mass is falling freely, the force acting on, it will be

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19.6 N

9.8 N

5 N

Zero

In a charged capacitor the energy is stored in

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Both in positive and negative charges

Positive charges

The edges of the capacitor plates

The electric field between the plates

The valence band of an atom in a solid

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is always empty

may or may not be empty

can never be empty

none of them

Blood pressure is measured in torr. Which of the following units could belong to torr?

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N m^-1

N m^-2

N m

N^-1m^-2

Pressure of a gas at constant volume is proportion to

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Total energy of gas

Average P.E to molecules

Average K.E of molecules

Total internal energy of gas

A mass of 5kg moves with an acceleration of 10m s^-2force applied is

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10N

50N

2N

20N

Nuclei that have the same charge number but different mass number are called

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isotones

isomers

isotopes

isobars

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

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reversible process

irreversible process

any one of them

none of them

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

If the distance between two charges is doubled, the force between them will become

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Double

Half

Three times

One fourth

One third

One electron volt is equal to

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1.6 x 1019eV

6.25 x 1018 eV

1.6 x 1018 eV

6.25 x 1019eV

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

The device which can convert heat energy into electrical energy is called:

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Thermistor

Thermometer

Thermostat

Thermocouple

Both (C) and (D)

In a semi-conductor material, current flows due to

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positive charge

negative charge

both of them

none of them

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