Question # 1

Which is the best material for making connecting wires:

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Iron

Copper

Tungsten

Nickel

the time period of body attached to spring depend on:

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mass

gravitational constant

length

amplitude

A conductor of electric current is:

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Wood

Rubber

Plastic

Copper

the water waves after striking the hurdle will:

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reflect

refract

diffract

all a b and c

earth wire is connected with those appliances whose casing is made of:

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metals

wood

glass

plastic

battery is one of the source of:

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heat

light

current

sound

The vacuum all electromagnetic wave have the same

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speed

frequency

amplitude

wavelength

The power of small fan is:

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40 W

50 W

60 W

80 W

AND gate can be formed by using two:

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NOT gates

OR gates

NOR gates

Nand gates

The waves, which are used to detect the broken bones are called:

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Light waves

x-rays

sound waves

both b and c

Release of energy by the sun is due to

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Nuclear fission

Nuclear fusion

Burning of gases

Chemical reaction

The voltage is decreased by:

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Step-up transformer

Step-down transformer

A.C. generator

D.C. Motor

The base of computer operation are:

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1,2

0, 1

0, 2

1, 10

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