General Science Jkssb Physics Set 1 Mcqs (448 MCQs)

Question 61 Discuss

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With the Theory of Relativity, transformed the landscape of physics, this theory majorly contributed to designing the theory of Quantum Mechanics.

A

Paul G. Hewitt

B

Galileo Galilei

C

Albert Einstein

D

Isaac Newton

Answer & Explanation

Correct Option: C

Albert Einstein published the Special Theory of Relativity in 1905, revolutionizing our understanding of space, time, and mass-energy equivalence.

Question 62 Discuss

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Which one of the following statements regarding magnetic field is correct?

A

Magnetic field lines are open curves

B

two magnetic field lines are found to cross each other

C

Magnetic field is a quantity that has no direction and magnitude

D

Magnetic field lines are closed curves

Answer & Explanation

Correct Option: D

Magnetic field lines are continuous closed loops that emerge from the north pole and enter the south pole outside the magnet.

Question 63 Discuss

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The motion of electric charges creates current and generates an electromagnetic force, resulting in .

A

Magnetism

B

Gravity

C

Optics

D

Electricity

Answer & Explanation

Correct Option: A

Oersted discovered in 1820 that moving electric charges produce a magnetic field, establishing the link between electricity and magnetism.

Question 64 Discuss

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Which of the following is a poor conductor of electricity?

A

Tap water

B

Distilled water

C

Water from pond

D

Water from hand pump

Answer & Explanation

Correct Option: B

Distilled water is a poor conductor because it lacks dissolved salts and ions which are necessary to carry an electric current.

Question 65 Discuss

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Which physicist is best known for his experiments on generating and confirming the existence of electromagnetic waves?

A

Heinrich Rudolf Hertz

B

Isaac Newton

C

JJ Thompson

D

Einstein

Answer & Explanation

Correct Option: A

Hertz confirmed Maxwell's electromagnetic theory by generating radio waves in his laboratory using a spark-gap transmitter.

Question 66 Discuss

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Using Fleming's right-hand rule, in which direction will the current flow if the direction of magnetic field is towards north and the conductor is moving vertically upward?

A

Towards south

B

Towards west

C

Towards south-west

D

Towards east

Answer & Explanation

Correct Option: B

By pointing the thumb upward (motion) and index finger North (field), the middle finger points West, indicating the direction of induced current.

Question 67 Discuss

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.........is one billionth of a metre.

A

millimeter

B

micrometre

C

parsec

D

nanometre

Answer & Explanation

Correct Option: D

A nanometer is an SI unit of length equal to 10⁻⁹ meters, commonly used to measure wavelengths of light and molecular sizes.

Question 68 Discuss

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An argon positive ion fired towards east gets deflected towards south by a magnetic field. The direction of magnetic field is:

A

towards north

B

towards south

C

upward

D

downward

Answer & Explanation

Correct Option: D

Using the Right-Hand Rule for a positive charge: thumb East (velocity), palm South (force), fingers point downward, indicating the magnetic field direction.

Question 69 Discuss

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When did the United Nations declare the World Physics Year to mark the 100th anniversary of Albert Einstein's 'Annus Mirabilis'?

A

1995

B

2000

C

2005

D

2010

Answer & Explanation

Correct Option: C

The year 2005 was declared World Physics Year to celebrate the centennial of Einstein's 1905 papers on relativity, the photoelectric effect, and Brownian motion.

Question 70 Discuss

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For domestic tariff, one unit of electrical energy consumption is equal to:

A

kilowatt-hour

B

milliamps hour

C

kilo joule hour

D

kilo volt ampere hour

Answer & Explanation

Correct Option: A

A 'unit' on an electricity meter represents 1 kilowatt-hour (kWh), which is 1000 watts of power used steadily for one hour.

General Science

Topics

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Practice Questions

With the Theory of Relativity, transformed the landscape of physics, this theory majorly contributed to designing the theory of Quantum Mechanics.

Answer & Explanation

Which one of the following statements regarding magnetic field is correct?

Answer & Explanation

The motion of electric charges creates current and generates an electromagnetic force, resulting in .

Answer & Explanation

Which of the following is a poor conductor of electricity?

Answer & Explanation

Which physicist is best known for his experiments on generating and confirming the existence of electromagnetic waves?

Answer & Explanation

Using Fleming's right-hand rule, in which direction will the current flow if the direction of magnetic field is towards north and the conductor is moving vertically upward?

Answer & Explanation

.........is one billionth of a metre.

Answer & Explanation

An argon positive ion fired towards east gets deflected towards south by a magnetic field. The direction of magnetic field is:

Answer & Explanation

When did the United Nations declare the World Physics Year to mark the 100th anniversary of Albert Einstein's 'Annus Mirabilis'?

Answer & Explanation

For domestic tariff, one unit of electrical energy consumption is equal to:

Answer & Explanation

General Science

Topics

Browse Topics

Practice Questions

With the Theory of Relativity, transformed the landscape of physics, this theory majorly contributed to designing the theory of Quantum Mechanics.

Answer & Explanation

Which one of the following statements regarding magnetic field is correct?

Answer & Explanation

The motion of electric charges creates current and generates an electromagnetic force, resulting in .

Answer & Explanation

Which of the following is a poor conductor of electricity?

Answer & Explanation

Which physicist is best known for his experiments on generating and confirming the existence of electromagnetic waves?

Answer & Explanation

Using Fleming's right-hand rule, in which direction will the current flow if the direction of magnetic field is towards north and the conductor is moving vertically upward?

Answer & Explanation

.........is one billionth of a metre.

Answer & Explanation

An argon positive ion fired towards east gets deflected towards south by a magnetic field. The direction of magnetic field is:

Answer & Explanation

When did the United Nations declare the World Physics Year to mark the 100th anniversary of Albert Einstein's 'Annus Mirabilis'?

Answer & Explanation

For domestic tariff, one unit of electrical energy consumption is equal to:

Answer & Explanation

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