Question
What is a voltmeter? How can a galvanometer be converted into a voltmeter of given range? Explain.

Answer

SELF

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

Explain ac voltage applied on a series LCR circuit and give its analytical solution.
What is nature of electromagnetic waves? Explain propagation of wave with the help of a diagram and explain their characteristics in detail.
Two identical balls, each having a charge of 2.00 × 10-7C and a mass of 100g, are suspended from a common point by two insulating strings each 50cm long. The balls are held at a separation 5.0cm apart and then released. Find,
  1. The electric force on one of the charged balls.
  2. The components of the resultant force on it along and perpendicular to the string.
  3. The tension in the string.
  4. The acceleration of one of the balls. Answers are to be obtained only for the instant just after the release.
Figure shows a small spherical ball of mass m rolling down the loop track. The ball is released on the linear portion at a vertical height H from the lowest point. The circular part shown has a radius R.
  1. Find the kinetic energy of the ball when it is at a point A where the radius makes an angle $\theta$ with the horizontal.
  2. Find the radial and the tangential accelerations of the centre when the ball is at A.
  3. Find the normal force and the frictional force acting on the ball if H = 60cm, R = 10cm, $\theta=0 $ and m = 70g.

The magnetic field in the cylindrical region shown in figure increases at a constant rate of 20.0mT/s. Each side of the square loop abcd and defa has a length of 1.00cm and a resistance of $4.00\Omega.$ Find the current (magnitude and sense) in the wire ad if:

  1. The switch S1 is closed but S2 is open.
  2. S1 is open but S2 ia closed.
  3. Both S1 and S2 are open.
  4. Both S1 and S2 are closed.

A source of sound operates at 2.0kHz, 20W emitting sound uniformly in all directions. The speed of sound in air is 340m/s and the density of air is 1.2kg/m3.
  1. What is the intensity at a distance of 6.0m from the source?
  2. What will be the pressure amplitude at this point?
  3. What will be the displacement amplitude at this point ?
For the same objective, find the ratio of the least separation between two points to be distinguished by a microscope for light of 5000A and electrons accelerated through 100V used as the illuminating substance.
A particle of mass m and positive charge q, moving with a uniform velocity v, enters a magnetic field B, as shown,
  1. Find the radius of the circular arc it describes in the magnetic field.
  2. Find the angle subtended by the arc at the centre.
  3. How long does the particle stay inside the magnetic field?
  4. Solve the three parts of the above problem if the charge q on the particle is negative.

The magnetic field existing in a region is given by $\overrightarrow{\text{B}}=\text{B}_0\Big(1+\frac{\text{x}}{\text{l}}\Big)\overrightarrow{\text{k}}.$ A square loop of edge land carrying a current i, is placed with its edges parallel to the x - y axes. Find the magnitude of the net magnetic force experienced by the loop.
A servo voltage stabiliser restricts the voltage output to 220V ± 1%. If an electric bulb rated at 220V, 100W is connected to it, what will be the minimum and maximum power consumed by it?