Question # 1

The energy is transferred from one place to another:

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Through matter

Thouth waves

both a and b

None of these

According to Ohm's law V =________

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I²R

IR²

IR

I/R

Human skin, in dry conditions, has a resistance of:

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

Which gate is used for safety alarm:

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AND

NANAD

OR

NOR

The unit of power is _________

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Volt

Watt

Joule

Coulomb

The shape of magnetic lines of force in case of a straight current carrying conductor is:

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Eliptical

Trangular

Rectangular

Circular

As the temperature of a conductor rises, its resistance.

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Increase

Decrease

Does not change

None of these

The loudness of sound is most closely related to its:

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Freqeucy

Period

Wavelength

Amplitude

Why household appliances should be connected in parallel with the voltage source:

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To increase the resistance of the circuit

To decrease the resistance of the circuit

To provide each appliance the same voltage as the power source

To provide each appliance the same current as the power source

The ratio of external force applied on the spring to displacement is called:

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Hook's law

Constant

Spring constant

1 nano farad is equal to:

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1 x 10^-12 F

1 x 10⁹F

1 x 10^-9F

1 x 10^-6F

For observing how fast plants are absorbing phosphate fertilizer we use.

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I.131

Ph -32

Co-60

Ar-40

Unlike charges always:

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Repel each other

Attract each other

Sometimes repel and attract each other

Both A and B

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