Question # 1

By convention, torques producing clockwise rotation are taken as:

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Positive

Nagative

Zero

None of these

The SI unit of flux density is.

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Tesla

Weber

Gaun

Weber/meter

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

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32°C

-32°C

-40°C

-212°C

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

An ordinary glass gradually softens into a 'paste -like' state before it becomes a very viscous liquid. It happens almost at:

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800^oC

500^oC

300^oC

100^oC

None of these

A body of weight 1 N has a kinetic energy of 1 joule when its speed is:

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1.46 m sec^-1

2.44 m sec^-1

3.42 m sec^-1

4.43 m sec^-1

In a straight current carrying conductor, the direction of magnetic field can be found by

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right hand rule

left hand rule

head to tall rule

none of these

A boat of mass 40 kg is at rest, A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat?

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4 m/s

2 m/s

8 m/s

1 m/s

The time of flight of a projectile motion equal to

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half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

According to the special theory of relativity, a moving clock

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runs faster

runs slower

neither runs faster nor slower

all of these

When a wave is travels from one place to another, it transfers:

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Matter

Energy

Momentum

Both B and C

The SI unit of stress is same as that of.

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Momentum

Pressure

Force

Length

A usual way to obtain a plane wave is to place point source of light at the focus of a

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concave lens

convex lens

both of them

either of them

A substance which have empty conduction band is called

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Conductor

Insulator

Semiconductor

None of these

The equation (V₁- V₂) = - (V₁- V₂) shows that relative velocities before and after the collision has the

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same magnitude and same direction

same magnitude and opposite direction

different magnitude and opposite direction

different magnitude and same direction

Fiber optics also used to transmit light

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Around corners

Into inaccessible place

Formerly unobservable objects

All of these

A grating with high resolving power can distinguish ______ difference in ______

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Smaller, amplitude

Greater, wavelength

Smaller, wavelength

Greater, intensity

Two equal an opposite forces acting along the same line of action will result in

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translational equilibrium only

rotational equilibrium only

translational as well as rotational equilibrium

neither translational nor rotational equilibrium

An alpha particle is accelerated through a potential difference of 10⁶ volt.Its kinetic energy will be.

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1 MeV

2 MeV

4 MeV

8 MeV

A PN junction diode cannot be use:

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As rectifier

For converting light energy to electrical energy

For getting light radiation

For increasing the amplitude of an ac signal

Which of the given strains can also be written as tan θ

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Compressional strain

Volumetric strain

Shear strain

All of these

An aircraft is moving with a velocity of 300 ms^-1.If all the forces acting on it are balanced then

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It still moves with the same velocity

It will be just floating at the same point in space

It will be fall down instantaneously

It will lose its velocity gradually

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