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Physics 10th Class English Medium Unit 9 Online Test MCQs With Answers

Question # 1

The reason carbon dating work is that.

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Plants and animals are such strong emitters of carbon 14

After a plant or animal dies, it stops in fresh carbon

There is so much non radioactive carbon dioxide in the air

When a plant or animal dies.

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Question # 2

the range of galvanometer to measure current is:

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few amperes

few micro amperes

few milli amperes

mega amperes

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Question # 3

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

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I.131

Ph -32

Co-60

Ar-40

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Question # 4

According to ohm’s law V= :

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I²R

IR²

I/R

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Question # 5

for which of following ampere second could be the unit:

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energy

current

charge

power

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Question # 6

Which element is used for the monitoring of thyroid glands?

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Iodine- 131

Phosphorus-32

Carbon-14

Potassium-40

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Question # 7

Which among the following radiation has more penetrating power?

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A beta pareticle

A gamma particle

An alpha particle

None of these

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Question # 8

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

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metals

wood

glass

plastic

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Question # 9

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

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Question # 10

Which radiations are free of effect of electric and magnetic field?

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Alpha

Beta

Gamma

Alpha and beta

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Question # 11

V²/R=:

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Power

Energy

Voltage

Resistance

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Question # 12

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

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