Question # 1

Four students measure the diameter of a cylinder with vernier callpers. Which of the following readings is

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3.4 cm

3.47 cm

3.5 cm

3.475 cm

It is more difficult to walk on a slippery surface than on a nonslipery one because of

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Lower weight

Increased friction

Reduced friction

High grip

Heat is the

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The energy in transit

Total kinetic energy of the molecules

The internal energy

Work done by the olecules

If a cyclist has acceleration of 2 m/s2 for 5 seconds, the change in velocity of they cyclist is.

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15 m/s

10 m/s

2 m/s

20 m/s

What is mass of a liquid of density 50 kg m-3 in a container of volume 5 m3?

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200 kg

250 kg

225 kg

275 kg

In a vernier Calipers ten smallest divisions of the Vernier scale are equal to nine smallest divisions of the main scale. If the smallest divisions of the main scale is half milimeter, the Vernier constant is equal to.

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0.05 mm

0.5 mm

0.1 mm

0.001 mm

Pressure of 1 mm Hg is equal to

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1 atm

133.29 atm

1.316 x 10^-3 atm

1.31x 10⁵atm

One femtometre is equl to

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10^-15 m

10¹⁵m

10^-9m

10⁹m

A tightropw walker is carrying a long pole while walking across a rope The stability of the walker is affected if the pole is

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Short and placed horizontally

Long and placed horizontally

Short and placed vertically

Long and placed vertically

A ball is throuwn straight up, what is the magnitude of acceleration at the top of its path.

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9.8 m/s2

zero

19.6 m/s2

4.9 m/s2

For observing how fast plants are absorbing phosphate fertilizer we use.

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I.131

Ph -32

Co-60

Ar-40

The waves, which are used to detect the broken bones, are called:

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Light waves

x-rays

Sound waves

both b,c,

The commercial unit of electrical energy is:

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Joule

Watt

Kilowatt hour

Electron volt

One coulomb is equal to charge of ________ electrons.

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6.25 x 10^-19

6.25 x 10¹⁹

6.25 x 10¹⁸

6.25 x 10^-18

One micro coulomb charge is equal to:

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10^-3c

10³c

10⁶c

10^-6c

The unit of intensity of sound:

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wm^-1

wm

wm^-2

wm^-3

The distance between principal focus and pole of mirror is called:

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Principal focus

Focal length

Aperture

Image

Iron core is used in tranformer to:

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Enhance the flux

Decrease the flux

Keep flux the same

botha a and b

When resistances are connected in parallel, the current passing through them is:

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Same

Zero

Different

Infinite

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

Polarization

The difference between tow molar capacities is equal to.

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Plank's constant

General gas equation

Molar gas constant

Boltzmann constant

The numer of significant figureswith the increases accracy of the measuring instrument

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Decreases

Remains unchanged

Increasees

None of these

In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is.

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Real inverted

Virtual diminshed

Virtual inverted

Virtual erected

The wavelength of wave produced by microwave oven is.

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12 cm

12 m

18 m

18 cm

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

The sum of positive and negative peak value called.

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R.M.S. value

P-P value

Peak value

Average value

Energy produced due to fission of uranium atom is:

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500MeV

200MeV

700MeV

750MEV

Curie is unit of.

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Conductivity

Binding energy

Radioactivity

Resistivity

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

Special organs called ampullae of lorenzenite are present in.

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Bats

Cats

Dogs

Sharks

An atom can reside in excited state for

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10^-8 second

One second

10^-10 second

More than one second

Ampere second stands for the unit of.

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Charge

emf

energy

Power

When a nucleus emits alpha particle its atomic mass decreases by

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1

2

3

4

The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by

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Bevm

The SI unit of magnetic induction Tesla is equal to

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N-1 Am

NA m2

NA-1n2

NA-1m-1