Question # 1

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

Which element is used to locate the ulcer in brain?

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Iodine-131

Phosphorus-32

Carbon-14

Potassium-40

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power:

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Remains unchanged

Halves

Doubles

Four time

Release of energy by the sun is due to

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Nuclear fission

Nuclear fusion

Burning of gases

Chemical reaction

The power of small fan is:

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40 W

50 W

60 W

80 W

One of the isotopes of uranium is²³⁸U₉₂the number of neutrons in the isotopes is.

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92

146

238

330

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

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I.131

Ph -32

Co-60

Ar-40

The temperature at the centre of sun is.

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10 million k

20 million k

30 million k

35 million k

The unit of electric power is:

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Volt

Watt

Joule

Coulomb

The symbol of atomic mass number is:

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A

X

N

Z

Which instrument is used to detect current:

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Galvanometer

Voltmeter

Ammeter

Electroscope

The A.C used in Pakistan has frequency:

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60 Hz

30 Hz

50 Hz

130 Hz

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10th Class Physics Chapter 18 Radioactivity English Medium KPK Boards Online Mcqs MCQs With Answers

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