Question # 1

Fossils fuels are usually compound of:

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Carbon

Hydrogen

Carbon & Hydrogen

None of these

ΣF=0 is __________ condition of equilibrium:

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1st

2nd

Unstable

Stable

The numebr .00580 is scientific notation is.

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5 .80 x 10⁵

5 .80 x 10^-4

5 .80 x 10^-3

5 .80 x 10^-2

Metals are good conductor of heat due to:

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Free electrons

Reamain same

Small size of their molecules

Rapid vibration of their atoms

Process by which liquids changes into vapors is ............... .

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Vaporization

Evaporation

Boiling

None of above

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

If force is 200 N and length of spanner is 0.15 then torque will be:

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30 Nm

15Nm

20 Nm

10 Nm

The temperature if steam is

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0°C

100°C

273°C

-273°C

The unit of stress is:

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Newton

Pascal

Nm^-2

m³

Most of the matter that fills the universe is in state:

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Solid

Plasma

Liquid

Gas

Melting point is also known as:

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Moiling point

Freezing point

Fusion point

None of these

Power of hair dryer is:

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1000 W

750 W

10 W

75 W

Which waves of the following has highest frequency?

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Radio waves

Micro waves

Light wave

Sound wave

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

From which of the following you can get information almost about everything?

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Book

Teacher

Computer

Internet

The direction of electric field lines due to positive charge is:

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A way from the charge

Towards the charge

Both a and b

None of these

A capacitor stores 0.24 coulombs at 10 volts. It capacitance is:

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0.024F

0.12F

0.6F

0.8F

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

Typographical errors in BASIC statements are:

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Runtime errors

Logical Errors

Syntax errors

Execution errros

The maximum displacement from mean position is called:

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Maximum height

Time period

Amplitude

Interval

If the potential energy of none coulomb charge is one joule then its potential will be:

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5 volt

2 volt

3 volt

1 volt

The minimum number of correctly positioned communication satellites to cover whole populated earth is.

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2

3

100

200

The force and torque are analogous to

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Velocity

Mass and weight

Moment of Inertia

Each other

The entropy of the universe with passage of time is.

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Increases

Decreases

Remain constant

Increases and decreases

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

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

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Diffraction

Stationary waves

Polarization

Interference

The Newton's formula for the speed of sound in air is

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The frictional force is

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Conservative force

Non conservative force

Electric force

Magnetic force

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

If velocity time graph is parallel to time axis, then acceleration of moving body will be.

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Maximum

Positive

Zero

Negative

When motor is just started, back emf is almost.

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Maximum

Zero

Minimum

Infinite

Which of the following series of hydrogen spectrum lies in ultra violet region.

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Lyman sereis

Paschen series

Balmar series

Bracket series

The quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

A transistor has parts:

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2

3

4

5

In 1905, the special theory of relativity was proposed by

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Einstein

Bohr

Maxwell

De Broglie

In chopke coil the resistance X_L an resistance R are:

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X_L=R

X_L<<R

X_L>>R

X_L=∞

In case of op-amp as an inverting amplifier, V₊ - V_- = 0, this is because

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Open gain loop is very low

Closed loop gain is very high

Open loop gain is very high

Both (a) and (a)

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

Which is not true for X rays

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X rays are not defected by electric field

X rays are polarized

X rays consist of electromagnetic waves

X rays can be diffracted by grating

Magnetic effect of current is used

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To detect a current

To measure a current

In electric motor

All of above

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W