Question # 1

The velocity of a projectile is maximum

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At the highest point

At point of launching and just before striking the ground

At half of the height

After striking the ground

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

The dimensions of work are

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MLT^-1

MLT^-2

ML²T^-2

ML^-1T^-1

Unite of thermodynamics scale of temperature is.

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Centigrade

Fahrenheit

Kelvin

Celsius

The collision between the gas molecules is

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Elastic

Inelastic

Both a and b

None of these

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

X-ray diffraction has been very useful in determining the structure of

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Hemoglobin

Stars

Galaxies

Stones

1 torr in Nm-2 is expressed as.

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130.5 Nm-2

133.3 N m-2

140.2 Nm-2

135.2 Nm-2

Work has dimension lime

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Torque

Momentum

Velocity

Power

The distance covered by wave in 1 sec is

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wavelength

Wave number

Wave speed

Frequency

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

First law of thermodynamics can be defined by the equation

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At constant temperature and pressure, if volume of given mass of a gas is doubled then density is.

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Doubled

1/4 original

1/2 of original

Unchanged

If the slope of a velocity time graph gradually decreases than body is said to be moving with

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Positive acceleration

Negative acceleration

Uniform velocity

None

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

The diameter of a lens is called

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Focal length

Aperture

Principle axis

Centre

When two waves of same frequency travel in opposite direction, the phenomenon will be

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Diffraction

Stationary waves

Polarization

Interference

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11th Class Part 1 Physics Test Online MCQs With Answers

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