MCQ
Three specimens $\text{A, B, C}$ of same radioactive element has activities $1$ microcurie, $1$ rutherford and $1$ becquerel respectively. Which specimen has maximum mass?
  • A
    $A$
  • $B$
  • C
    $C$
  • D
    All have equal masses.

Answer

Correct option: B.
$B$

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

The equivalent capacitance between $A$ and $B$ in the figure is $1\,\mu F$. Then the value of capacitance $C$ is.....$\mu F$
When light is incident on a medium at angle i and refracted into a second medium at an angle $ r$, the graph of $sin\, i $ vs $sin\,r $ is as shown in the graph. From this, one can conclude that
For a common base configuration of $PNP$ transistor $\frac{{{l_C}}}{{{l_E}}} = 0.96$ then maximum current gain in common emitter configuration will be
A transistor oscillator is
$(i)$ an amplifier with positive feedback $(ii)$ an amplifier with reduced gain $(iii)$ the one in which $dc$ supply energy is converted into an output energy. Then
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A$ : The photoelectric effect does not take place, if the energy of the incident radiation is less than the work function of a metal.

Reason $R$ : Kinetic energy of the photoelectrons is zero, if the energy of the incident radiation is equal to the work function of a metal.

In the light of the above statements, choose the most appropriate answer from the options given below

A magnet can only repel another magnet. So, $‘X\ ’$ is a surer test of magnetism. Identify $X.$
Which of the following is a widely used variety of commercial resistor?
A nucleus of mass $M + \Delta m$ is at rest and decays into two  daughter nuclei of equal mass $\frac{M}{2}$ each. Speed of light is $c.$

The speed of daughter nuclei is

In electromagnetic induction, the induced charge in a coil is independent of
What physical quantities may X and Y represent ? (Y represents the first mentioned quantity)