Question # 1

In which case it is easy for the tyre to roll over:

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Rough ground

Smooth ground

Same

None

the to and fro motion of a body about its mean positionis called.

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Circular motion

Random motion

Rotatory motion

Vibratory motion

The centripetal acceleration is always along.

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Normal force

Centripetal forces

Mass

Horizental forces

The value of gravitational constant is, G is:

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6.67× 10-10 Nm2/Kg2

6.67× 10-11 Nm2/Kg2

6.67× 10-11

None

In Einstein's mass-energy equation c means speed of light. Its value is:

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3 x 10^-8 ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10¹⁸ms^-1

The formula to determine the centripetal force is:

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Ms

mv²/r

Ns

Ns^-1

Those objects that conduct electricity are:

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Conductors

Insulators

Semi conductOrs

None of these

What happens to the thermal conductivity of a wall if its thickness is doubled?

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Become double

Remain the same

Become half

Become one fourth

Cream separater works on:

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Centrifuge principle

Centripetal force

Both

None

A couple is formed by

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Two forces perpendicular to each other

Two like parallel forces

Two equal and opposite forces in the same line

Two equal and opposite forces not in the same line

a ball is thrown vertically upward. Its velocity at the highest point is.

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10 ms^-2

-10 ms^-1

Zero

none of them

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2 Ω

4 Ω

8 Ω

12 Ω

F=

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qE

q-E

q/E

q+E

What will be the capacitance of capacitor by joining them in parallel:

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Increased

Much less

Decrease

No change

When a positive charge of 2 coulombs is placed at a point in an electric field, it experiences a force of 6N. The intensity of electric field at this point is:

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6 NC^-1

3 NC^-1

12 NC^-1

1.5 NC^-1

How does sound travel from its source to your ear?

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Byc changes in air pressure

By vibration in wires or strings

By electromagnetic waves

By infrared waves

Which device has two coils, primary and secondary?

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D.C. Motor

Transformer

A.C. genrator

a and b

Pitch of sound depends upon:

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Frequency

Amplitude

Intensity

Time period

1 GB = ______________ Megabytes.

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1022

1023

1024

1025

The loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

Each volt of lightening contains energy:

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4x10⁶ joules

1000 joules

1000 million joules

10 joules

Specific resistance of copper is ____________ x 10^-8Ohm-meter

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1.62

1.69

5.25

2.75

Which of the following are not hadrons.

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Muons

Mesons

Positrons

Neutrons

The conductors having the conductivity of the order of

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Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

A capacitor is perfectly insulator for:

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Direct current

Alternating current

Direct as well as alternating current

None of these

A transistor has:

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Two regions

Three regions

Single regions

Four regions

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

In AC system we generate sine wave form because:

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It san be easily draw

It produces least disturbance in electrical circuits

It is nature standard

Other waves cannot be produced easily

Which one of the following is ductile substance.

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Copper

Lead

Wrought iron

All of them

Unit of self inductance is

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Weber

Tesla

Henry

Farad

Which of the following is one of the spectral series of atomic hydrogen?

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Brockett series

Balmer series

P fund series

All of above

Electro magnetic waves emitted from radio antenna are.

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Stationary

Longitudinal

Transvers

Both a and b

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