_ formulated the Theory of Relativity

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KPTCL Assistant Exam (Mescom) SLOT1 2017 click here to view all questions

________ formulated the Theory of Relativity.

AAlbert Einstein

BThomas Alva Edison

CCharles Darwin

DMichael Faraday

Nithin K ? Jul 31 '2017 at 20:0

Answer is : Albert Einstein

Explanation:

The general theory of relativity is the modern theory of gravitation, proposed in 1915, also by Albert Einstein. The central point of the theory is the principle of general relativity, which states that all observers, regardless of their state of motion, will see the same laws of physics operating in the universe.

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An electric charge in uniform motion produces

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RRB ASSISTANT LOCO PILOT (Allahabad) 2010 click here to view all questions

An electric charge in uniform motion produces

Aan electric field only

Ba magnetic field only

Cboth electric and magnetic field

DNone of these

prajwal ? Dec 24 '2019 at 10:2

Correct answer is: both electric and magnetic field

Explanation:

The electric charge is defined as an intrinsic fundamental quantity that is present in every matter that exists.

It produces:

• The electric field.
• The magnetic field.

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• Electric charge always has an influencing space around it that has an electric field defined at every point in three-dimensional space irrespective of the motion of the charge. So, either it is in motion or not in motion, always have an electric field around it.
• Whenever a charge is in motion, due to its speed, temporary magnetic space is created around it which is there only till the charge is in motion. So, charge in motion has magnetic fields around it.

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The line joining the north and south poles of a magnet is called

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RRB ASSISTANT LOCO PILOT (Allahabad) 2010 click here to view all questions

The line joining the north and south poles of a magnet is called

AMagnetic axis

BMagnetic Meridian

CMagnetic field

DNone of these

prakash ? Jan 2 '2020 at 12:16

Correct answer is: Magnetic axis

Explanation:

If the line joining NORTH and SOUTH POLE of a magnet or of the EARTH is a straight line. it is called AXIS (magnetic axis in magnetism).

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If the length and cross sectional area of a wire are doubled, its resistance will

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RRB ASSISTANT LOCO PILOT (Allahabad) 2010 click here to view all questions

If the length and cross sectional area of a wire are doubled, its resistance will

Aremain unchanged

Bbecome twice

Creduce to one half

Dincrease four times

prakash ? Jan 2 '2020 at 13:4

Correct answer is: remain unchanged

Explanation:

Wire’s cross section doubled means its cross section area is doubled.

$\text{ Resistance} = \text{specific resistance} \times \frac{\text{length}}{\text{Area}}$

Hence, if length and  cross section area both doubled, resistance will remain same i.e inchanged.

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The temperature at which the volume of a gas becomes zero is called

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RRB ASSISTANT LOCO PILOT (Allahabad) 2010 click here to view all questions

The temperature at which the volume of a gas becomes zero is called

Aabsolute temperature

Babsolute zero temperature

Cabsolute scale of temperature

DNone of these

roshan ? Jan 11 '2020 at 21:50

Correct answer is: absolute zero temperature

Explanation:

The temperature at which the volume of an ideal gas becomes zero; a theoretical coldest temperature that can be approached but never reached. Absolute zero iszero on the Kelvin scale, -273.15°C on the Celsius scale, and -459.67°F on the Fahrenheit scale

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