Question # 1

The weight of a body is 100 N its weight in deep space is :

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100 N

50 N

25 N

0 N

What of the following is a god radiator of heat?

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a Shinning silvered surface

a dull black surface

a white black surface

a shinning colored surface

An increasing with decline in atmospheric pressure cause:

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Rainy condition

Pleasent condition

Windy condition

Intense condition

S.I unit of young's modulus is:

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Nm

Nm^-1

Nm^-2

Nm^-3

False ceiling is done to

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Lower the height of ceiling

Keep the roof clean

Cool the room

Insulate the ceiling

Mercury is denser than water by time:

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13,6

10

15

20

The method used for addition of non-parallel forces is.

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Algebraic

Head to trail rule

Mathematical

Nil

Celsius temperature is converted into Fahrenheit temperature using the formula

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F = 1.8 C + 32

F = 1.8 C - 32

F = 1.4 C + 32

F = 1.4C - 32

The first man who came up with the idea of gravity was?

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Issac Newton

Einstein

Faraday

J,S Joseph

The unit of force is

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Newton

m³

ms^-2

ms^-1

_____________ is centre from which its mass is equally distributed:

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Cebtre of mass

Centre of gravity

All of above

None

It mass of bob o a simple pendulum is doubled, its time period.

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is doubled

become four times

remains same

none of the above

electric intensity is a quantity:

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scalar

vector

base

none of these

The mirror whose inner surface is reflecting is called:

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Concave mirror

Convex mirror

Miroor

Lens

The time period of mass attached with a spring can be calculated by:

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T = 2π√L/g

T = 1/T

T =2π√g/L

T = 2π√m/k

The unit of Rh is.

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ms-1

m

m²

m^-1

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

The chargeless region after formation of Pn junction is called:

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Free region

Depletion region

Field region

U.V region

The vessel containing the tow electrodes and liquid to known as.

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Chemical cell

Volt cell

Volta cell

Volta meter

The word amorphous means:

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Regular structured

Without form or structure

Frozen structured

None of above

In extrinsic semiconductors doping is of the order of.

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1 atom to 10⁴

1 atom to 10⁶

1 atom to 10⁸

1 atom to 10³

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

A soft iron cylinder is placed inside coil galvanometer to:

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Make field circular and strong

Make field radial and weak

Make field radial and strong

All of above

Commutator was invented in

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1834

1820

1840

1835

1 Henry =

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VSA^-1

VS^-1A^-1

V^-1SA

VSA^-2

Impedance is denoted by:

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A

Z

P

Q

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