MCQ
E = mc2
  • A
    $\text{E} = \frac{\text{m}}{\text{c}^2}$
  • B
    M = Ec2
  • C
    All of the expressions are accurate.
  • D
    c = Em2

Answer

  1. E = mc2

Explanation:

Before Sir Einstien, mass and energy were two completely different physical quantities, which were not related to each other anyway.

Sir Einstein told that energy and mass are related to each other i.e. energy and mass can be converted into each other by the following relation:

E=mc2, called Sir Einstein's mass-energy equivalence.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

In the network shown in the figure, each of the resistance is equal to 2Ω. The resistance between the points A and B is

(a) 1 Ω

(b) 4 Ω

(c) 3 Ω

(d) 2 Ω

What is the C.G.S. unit of charge?
An electron is moving in a circular orbit of radius R with an angular acceleration $\alpha$ At the center of the orbit is kept a conducting loop of radius r, (r<<R) The e.m.f induced in the smaller loop due to the motion of the electron is:

A group of N cells whose emf varies directly with the internal resistance as per the equation EN = 1.5 rN are connected as shown in the figure below.  The current I in the circuit is

(a) 0.51 amp

(b) 5.1 amp

(c) 0.15 amp

(d) 1.5 amp

Heavy water is

(a) Water at 4

(b) Compound of deuterium and oxygen  

(c) Compound of heavy oxygen and heavy hydrogen

(d) Water, in which soap does not lather

Assertion  : If the temperature of a semiconductor is increased then it's resistance decreases.

Reason      : The energy gap between conduction band and valence band is very small

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

Long distance short-wave radio broadcasting uses

(a) Ground wave

(b) Ionospheric wave

(c) Direct wave

(d) Sky wave

The coefficient of self inductance and the coefficient of mutual inductance have.
Which one of the following graphs in following figure represents variation of reactance ′Xc′​ of a capacitor with frequency 'f' of an ac supply?
_________ Charge is produced by friction.