Question # 1

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

Static electricity can be generated by:

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Lubrication

Friction

Motion

Smaller the objects

The property of substance, which opposes the flow of current through it is called:

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Resistance

Reactance

Resistivity

None

The part of waves at which particles of the medium are below the normal position are called:

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Extreme positon

Crest

Trough

None of these

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

In there is no extension in the spring then this positon is called

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Equilibrium position

Unequilibrium

Nautral equilibrium

Stable equilibrium

When a uranium (92 protons) ejects a beta particle, how many protons are left in the remaining nucleus?

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92 protons

91 protons

93 protons

89 protons

One micro coulomb charge is equal to:

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10^-3 C

10³C

10⁶C

10^-6C

LDR can act as:

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Diode

Switch

Transistor

Rectifier

The unit of spring constant is:

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m

kg

Nm²

Nm^-1

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

In variable capacitor, dielectric medium is:

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Paper

Air

Mica

Ceramic

1 GB = ______________ Megabytes.

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1022

1023

1024

1025

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