MCQ
The pointer of a dead-beat galvanometer gives a steady deflection because
  • Eddy currents are produced in the conducting frame over which the coil is wound
  • B
    Its magnet is very strong
  • C
    Its pointer is very light
  • D
    Its frame is made of abonite

Answer

Correct option: A.
Eddy currents are produced in the conducting frame over which the coil is wound
 Eddy currents are produced in the conducting frame over which the coil is wound

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

Scale used in moving coil galvanometer is:
In Young's double slit experiment, the distance between the slits is $1 \,mm$ and that between slit and screen is $1 $ meter and $10th $ fringe is $5 \,mm$ away from the central bright fringe, then wavelength of light used will be.....$\mathop A\limits^o $
At neutral temperature, the thermoelectric power $\left(\frac{\mathrm{dE}}{\mathrm{dT}}\right)$ has the value
A compound microscope with an objective lens of focal length $1\, cm$ and an eye piece  of $2 \,cm$ focal length has a tube length of $20 \,cm$. Calculate the magnifying power of  the microscope, if the final image is formed at least distance of distinct vision
A long solenoid of radius $1\,mm$ has $100 $turns per $mm$. If $1\,A$ current flows in the solenoid, the magnetic field strength at the centre of the solenoid is:
A current loop in a magnetic field 
The time period of a vibration magnetometer is $T_0$. Its magnet is replaced by another magnet whose moment of inertia is $3$ $times$ and magnetic moment is $1/3$ of the initial magnet. The time period now will be
The lines joining the places of the same horizontal intensity are known as
A sphere carrying charge of $Q$ having weight $w$ falls under gravity between a pair of vertical plates at a distance of $d$ from each other. When a potential difference $V$ is applied between the plates the acceleration of sphere changes as shown in the figure, to along line $BC$. The value of $Q$ is :-
Statement $-1: \text{NAND}$ and $\text{NOR}$ gates are called digital building blocks.
Statement$-2:$ The repeated use of $\text{NAND} ($or $\text{NOR})$ gates can produce all the basis or complicated gates.