Question # 1

If the two charges in Coulomb's law have double distance between them, then electric force

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Becomes two-fold

Becomes four-fold

Remains the same

None of these

Centripetal acceleration is also called ______ acceleration:

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Tangential

Radial

Angular

None of them

Root out of the conventional source of energy:

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Energy from biomass

Hydroelectric energy

Geothermal energy

None of these

The year when A.H. compton was awarded Nobel Prize is:

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1923

1927

1931

1935

None of these

In the reverse process, the working substance passes through the same stages as in the direct process and

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thermal effects at each stage are exactly reversed

mechanical effects at each stage are exactly reversed

thermal and mechanical effects at each stage remain the same

thermal and mechanical effects at each stage are exactly reversed

When the bob of simple pendulum is at mean position, its K.E will be

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maximum

minimum

zero

all of them

The volume of universal gas constant R is:

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8.314 J/K mole K

8314 J/K mole K

8.314 J/mole K

None of these

Most practical applications of electricity involve

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Charges at rest

Charges in motion

Electrons at rest

Atoms in motion

Molecules in motion

The unit of flux density is also given by

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Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

When heat is added into the system then change in entropy is

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negative

positive

zero

any one of them

Velocity of a body changes if

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direction of the body changes

speed of the body changes

neither speed nor direction changes

either speed or direction changes

When the lift is falling freely under gravity, then

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T = W - mg

T - W = ma

T = 0

None of these

A science student takes 100 observations in an experiment Second time he takes 500 observations in the same experiment By doing so the possible error becomes

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5 times

1/5 times

Unchanged

None of these

The device which is used to measure the degree of hotness or coldness of the object.

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Thermometer

Barometer

Hypermeter

None of these

If they donot have a = 9.8 ms^-2 they would fly

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In the same orbit

Off in a straight the tangent to Earth

Leaving the present orbit

None of these

A material having high refractive index has

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Low density

High density

Zero density

None of these

Which of the fluid has ideal behavior at low speeds

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Air

Blood

Honey

None of these

In full wave rectification, the output D.C. voltage across the load is obtainedfor

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The positive half cycle of input A.C. (C) The complete cycle of input A.C.

The negative half cycle of input A.C.

The complete cycle of

All of the above

The Dimension of acceleration is

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[L²T]

[LT²]

[LT^-2]

None of these

SI unit of temperature

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Centigrade

Celsius

Kelvin

All of these

Angular acceleration is produced in a body by the physical quantity called

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momentum

vibration

torque

centrifugal force

Under normal circumstances the volume of the blood is sufficient to keep the vessels

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Inflated all the time

Deflated all the time

Contracted all the time

Squeezed all the time

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