Question
Two galvanometers $A$ and $B$ require $3\,mA$ and $5\,mA$ respectively to produce the same deflection of $10$ divisions. Then
✓
Answer
(a) Sensitivity $(S)$ =$\frac{\theta }{i}$ $==>$ $\frac{{{S_A}}}{{{S_B}}} = \frac{{{i_B}}}{{{i_A}}} = \frac{5}{3} \Rightarrow {S_A} > {S_B}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A particle of mass $‘m’$ and charge $‘q’$ is accelerated through a potential difference of $V$ volt, its energy will be
→The work function of a certain metal is $2.3 \,eV$. ff light of wave number $2 \times 10^5 \,m ^{-1}$ falls on it, the kinetic energies of fastest and slowest ejected electron will be respectively
→$A$ bob of mass $m$ is attached to a string whose other end is tied to a light vertical rod as shown in figure. The bob is swinging in horizontal plane with constant angular speed $\omega$. The vertical rod is supported on a block of mass $M$ which is placed on a rough surface. What is minimum friction coefficient between ground and block for which block does not slip ?
→A circular loop of flexible conducting material is kept in a magnetic field directed perpendicularly into its plane. By holding the loop at diametrically opposite points its is suddenly stretched outwards, then
Two masses of $8\,kg$ and $4\,kg$ are connected by a string as shown in the figure over a fricitionless pulley. The acceleration of the system is ............ $ m/sec^2$
→Pure water super cooled to $-15^o C$ is contained in a thermally insulated flask. Small amount of ice is thrown into the flask. The fraction of water frozen into ice is :
→Force of interaction between two co-axial short electric dipoles whose centres are $R$ distance apart varies as
→If a charged spherical conductor of radius $10\,cm$ has potential $V$ at a point distant $5\,cm$ from its centre, then the potential at a point distant $15\,cm$ from the centre will be
→A mass $m$ is vertically suspended from a spring of negligible mass; the system oscillates with a frequency $n$. What will be the frequency of the system if a mass $4 m$ is suspended from the same spring
→According to Wein's law