Question # 1

One horse power is equal to:

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746 W

749 W

764 W

794 W

Room are heated using gas heaters by:

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Conduction only

Convection and radiation

Radiation only

Convection only

Independent quantities are taken on

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- x - axis

x -axis

-y-axis

y-axis

The unit of momentum is :

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kgms^-1

kgms^-2

m sec

None

Rolling friction is___________ then sliding friction :

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Greter

Less

Some

Half

The formula of heat capacity is:

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mc

mc𝜟𝜽

mc𝜟Q/𝜟T

None of these

Rate of change of momentum equals:

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Displacement

Acceleration

^Force

Velocity

The condition of equilibrium are:

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2

3

4

5

More radiation is reflected by the surface:

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White

Coloured

Black

Rough

Matter has basically ___________ states.

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4

3

Both a & b

None

Which gas is used inspite of Freon gas in refrigerator?

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CO₂

H₂

NH₃

N₂

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

Totally reflecting prism turns the incident ray at an angle of:

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90^o

60^o

75^o

45^o

In computer terminology, proceed data is called:

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Software

Program

Information

Digital data

The output of an AND gate is only 1, when:

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Both of its inputs are zero

Anyone of the two inputs is zero

Both of its inputs are 1

Anyone of the two inputs is 1

Thermocouples convert:

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Heat energy into electrical energy

Heat energy into light energy

Heat energy into mechanical energy

Chemical energy into electrical energy

If we double the distance between two charges, then force becomes:

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4-times

¼ th

Double

Half

Bats can hear sound of frequency up to:

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100,000Hz

25000Hz

120, 000Hz

1000Hz

Which wire has lowest resistance?

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Thick wire

Thin wire

Very thin wire

All

Which we double the voltage in a simple electric circuit. We double the

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Current

Power

Resistance

both a and b

Which part of a D.C. motor reverses the direction of current through the coil every half-cycle.

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The armature

The commutator

The burshes

The slip rings

Coulomb's law is mathematically stated as:

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F = k q1 q2/r3

F = k q2 q2 / r2

F = k q1 q2 / r

F = k q1 q2 / r2

A diode characteristic curve is a plot between

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse voltage

The impurity in the germinium is usually in the ratio of

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1:10⁶

1:10⁴

1:10⁸

1:10¹⁰

The most refined form of matter is:

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Smoke

Light

Ice

Fog

When a PN-Junction is reverse biased the depletion region is.

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Widened

Narrowed

Normal

None of these

The current flowing through each resistor of equal resistance in parallel combination is.

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Same

Different

Zero

Infinite

An alternating voltage is given by 20 sin 157 t. Th efrequency of alternating voltage is:

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50 Hz

25Hz

100 Hz

75 Hz

In LR circiut which one of the following statements is correct?

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L and R opposes each other

R value increases with frequency

The inductive reactance increases with frequency

The inductive reactance decreases with frequency

Number of electros emitted in photo electric effect depend upon.

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Intensity of incident light

Frequency of incident light

Energy of incident light

Wavelength of incident of light

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/Rt

H = I²/Rt

Commutator was invented by:

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William bills

William Gates

William tells

William Sturgeon

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