AIIMS Physics: Questions 198 - 201 of 500

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Question number: 198

» Work, Energy and Power » Work-Energy Theorem

Appeared in Year: 2003

MCQ▾

Question

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be –

Choices

Choice (4) Response

a.

920KeV

b.

1 KeV

c.

11840KeV

d.

1840KeV

Question number: 199

» Atoms and Nuclei » Half Life and Mean Life

Appeared in Year: 2003

MCQ▾

Question

A radioactive substance decays to 116th of its initial activity in 40 days. The half-life of the radioactive substance expressed in days is –

Choices

Choice (4) Response

a.

5

b.

10

c.

20

d.

2.5

Question number: 200

» Kinematics » Scalars and Vectors » Scalar and Vector Products

Appeared in Year: 2009

Assertion-Reason▾

Assertion (Ꭺ)

Assertion: Vector (i^+j^+k^) is perpendicular to (i^2j^+k^)

Reason (Ꭱ)

Two non-zero vectors are perpendicular if their dot product is equal to zero.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 201

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

In high latitudes one sees colorful curtains of light hanging down from high altitudes.

Reason (Ꭱ)

The high energy charged particles from the sun are defected to Polar Regions by the magnetic field of the earth.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are false

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