Question # 1

Distance covered by freely falling downward body in first second.

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5 m

29.4 m

10 m

19.6 m

The vector which has the same effect as the combined effect of vectors:

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Negative vector

The vector

Resultant vector

Zero vector

According to Archimedes principle upthrust is equal to

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weight of displaced liquid

volume of displaced liquid

mass of displaced liquid

are of displaced liquid

Things with _____________ area are more stable>

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Larger

Smaller

All

None of these

The eleventh general conference was held in Paris in.

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1959

1961

1660

1960

The acceleration of a body moving the uniform velocity is.

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Uniform

Zero

Negative

Variable

More radiation is reflected by the surface.

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White

Coloured

Black

Rough

In which hot liquid can remains hot:

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Glass

Lead

Thermos

Hot pot

the value of gravitational field strength near the earth is ________ Nkg^-1.

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1.62

100

10

160

Metals are good conductor of heat due to

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Free Electrons

Big size of their molecules

Small size of their molecules

Rapid vibrations of their atoms

The potential energy of a body of mass 'm' placed at a height 'h' above the surface of earth is equal to

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P.E. = mg

P.E. = mgh

P.E. = 3mgh

P.E. = 2mgh

parallel plate consists of 2 metal plates separated by:

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conductor

insulator

wooden plate

plastic foam

the resistance of an ammeter should be:

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high

very high

low

constant

AND gate can be formed by using two:

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NOT gates

OR gates

NOR gates

Nand gates

for which of following ampere second could be the unit:

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energy

current

charge

power

The motion in which the friction reduces the mechanical energy of the system as times passes and the amplitude of motion reduces is called:

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SHM

Randum motion

Damped motion

None of these

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt

The line which passes through pole of the mirror and center of curvature is called principal:

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axis

Focus

Line

None of these

The speed of sound in air is kmh^-1

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1243

1244

1245

1246

The S.I unit of power of a lens is:

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Dioptre

Volt

Ampere

Watt

A device which has two ways communication is:

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Television

Radio

Hard disk

Mobile phone

Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A.

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Remains uncharged

Becomes positively charged

Becomes negatively charged

Unpredicatable

According to Newton's formula, the speed of sound in air at STP is

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332 ,ms-1

340 ms-1

350 ms-1

280 ms-1

Original source of energy for biomass is

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Earth

Star

Moon

Sun

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

The orbital angular momentum is associated with the motion of a body along

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Straight path

Circular path

Curved path

Along any path

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

Pair production occurs only when energy of photon is at least equal in:

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1.02keV

1.02 eV

1.02 MeV

1.02 GeV

The activity of radioactive sample

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Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

Heat sensitive resistors are called.

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resistors

Capacitor

Thermistors

Inductors

In chopke coil the resistance X_L an resistance R are:

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X_L=R

X_L<<R

X_L>>R

X_L=∞

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

Michael Faraday and Joseph Henry belongs to

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England and USA

France and USA

China and USA

None of these

Doping is made comparatively larger in

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Emitter

Base

Collector

P -type semi conductor

The mutual inductance of the coils depends upon.

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Stiffness of the coils

Density of coils

Material of coils

Geometry of the coils

In a certain circuit, I_{B = 40 µA,}I_C= 20 mA

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450 amp

0.45 amp

5 m amp

500 amp

When 10 V are applied to an A.C circuit, the current flowing in it is 100 mA. It impedance is.

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100 Ohm

10 Ohm

1000 Ohm

1 Ohm