Question
Write the underlying principle of a moving coil galvanometer.
✓
Answer
A current carrying coil, in the presence of magnetic field, experiences a torque, which produces proportionate deflection.Alternate Answer
[(deflection) $\theta \alpha\tau$ (Torque)]
[(deflection) $\theta \alpha\tau$ (Torque)]
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
On a winter day the temperature of the tap water is $20^\circ C$ whereas the room temperature is $5^\circ C$. Water is stored in a tank of capacity $0.5m^3$ for household use. If it were possible to use the heat liberated by the water to lift a $10\ kg$ mass vertically, how high can it be lifted as the water comes to the room temperature? Take $g = 10\ ms^{-2}$.
→When unpolarised light from air, passes through transparent medium, in which direction will the reflected light be polarized?
Two charged particles having charge $2.0 \times 10^{-8}C$ each are joined by an insulating string of length $1m$ and the system is kept on a smooth horizontal table. Find the tension in the string.
→What is the effect on specific conductance of any electrolyte with increase in temperature?
Suppose that the electric field part of an electromagnetic wave in vacuum is $\text{E}=\{(3.1 \ \text{N}/\text{C}\cos[(1.8 \text{rad}/ \text{m}) \text{y}+(5.4\times10^6 \ \text{red}/\text{s}\text{t}]\hat{\text{i}}\}$.
→- What is the direction of propagation?
- What is the wavelength $\lambda$ ?
- What is the frequency $ν$ ?
- What is the amplitude of the magnetic field part of the wave?
- Write an expression for the magnetic field part of the wave.
How should a magnetic dipole be placed in a uniform magnetic field so that its potential energy is maximum?
Is the dispersion power of crown glass more or less than that of flint glass? Write.
The graph shows variation of stopping potential $V_0$ versus frequency of incident radiation $v$ for two photosensitive metals $A$ and $B.$ Which of the two metals has higher threshold frequency and why?
→What is the relation between produced magnetic field at the center of a circular current carrying coil and its radius?
An $\text{NCC}$ parade is going at a uniform speed of $6\ km/ h$ through a place under a berry tree on which a bird is sitting at a height of $12.1m.$ At a particular instant the bird drops a berry. Which cadet $($give the distance from the tree at the instant$)$ will receive the berry on his uniform?
→