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# Voltmeter ammeter galvanometer thermometer find the odd man out

All about Electromagnetism. A Choose the correct alternative and rewrite the following. Remains the same. Increases in steps.

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SEE VIDEO BY TOPIC: Galvanometer - Voltmeter, Ammeter and Ohmeter - Animation

## US2805394A - Alternating-current volt-ammeters - Google Patents

These solutions for Effects Of Electric Current are extremely popular among Class 10 students for Science Effects Of Electric Current Solutions come handy for quickly completing your homework and preparing for exams. Tell the odd one out. Give proper explanation. Fuse wire, bad conductor, rubber gloves, generator. Voltmeter, Ammeter, galvanometer, thermometer. Loud speaker, microphone, electric motor, magnet. The odd one out is generator.

It is an electrical device for producing electricity. Fuse wire, bad conductor and rubber gloves have high resistance and are used for blocking electricity. Thus, they can be used as a safety measure against heavy electricity. The odd one out is thermometer.

It is an instrument for measuring the temperature of a body. Rest of the three are electrical instruments based on the phenomenon of electromagnetism and are used for measuring some electrical parameters such as current and voltage. The odd one out is magnet. Explain the construction and working of the following. Draw a neat diagram and label it. Electric motor b. Electric Generator AC. A current carrying rectangular coil starts rotating when placed in a magnetic field.

A motor consists of a rectangular coil MNST of insulated copper wire. The coil is placed between two magnetic poles such that the magnetic field acts normal on lengths MN and ST. The coil is connected with two carbon brushes at points A and B respectively.

The inner sides of these carbon brushes are in contact with half rings C and D, which are insulated and in contact with an axle not shown in the figure. This happens because a downward force acts on length MN and at the same time, an upward force acts on length ST. As a result, the coil rotates anti-clockwise. Similarly, the current in length ST flows from S to T, and magnetic field acts from left to right normal to its length. These two forces cause the coil MNST and the axle to rotate anti-clockwise.

After half-rotation, the position of length MN and ST get interchanged. Simultaneously, half ring D comes in contact with brush A and half ring C comes in contact with brush B respectively.

An electric device that reverses the direction of current in a circuit is called a commutator. Thus, the split ring acts as a commutator of the electric motor. Now, due to the reverse direction of current in lengths MN and ST, an upward force acts on length MN, which pushes it up and a downward force acts on length ST, which pushes it down.

As a result, the coil MNST further rotates anti-clockwise. The reversal of the current through the coil MNST repeats at each half-rotation, while its anti-clockwise rotation continues. Electric Generator principle : An electric generator is a machine that generates electricity by rotating its rotor in a magnetic field. Thus, it converts mechanical energy into electrical energy. The inner sides of the rings are insulated. Since lengths MN and ST are moving in a magnetic field, a current gets induced in these lengths caused by an electromagnetic induction.

Since length MN is moving upwards in the magnetic field that acts from left to right, the direction of the induced current will be from M to N. Similarly, the direction of the induced current in length ST will be from S to T. Hence, an induced current will set up in the coil in the direction MNST, which produces deflection in the galvanometer. After half-rotation, length MN starts moving down, whereas length ST starts moving up.

The direction of the induced current in the coil gets reversed i. An AC reverses its direction after equal time intervals. Electromagnetic induction means- a. Charging of an electric conductor. Production of magnetic field due to a current flowing through a coil.

Generation of a current in a coil due to relative motion between the coil and the magnet. Motion of the coil around the axle in an electric motor.

AC generator. Which device is used to produce electricity? Describe with a neat diagram. Galvanometer c. Electric Generator DC d. The device used for producing electricity is Electric generator DC. It is based on the phenomenon of electromagnetic induction. In this arrangement, brush A always remains in contact with the length moving up, whereas brush B always remains in contact with the length moving down.

Here, split rings C and D act as a commutator. Short circuit occurs when naked live and neutral wires touch each other. In such situations, the resistance of the circuit becomes very less. Thus, the decrease in value of resistance of the circuit raises the current to a significant amount.

Give Scientific reasons. Tungsten metal is used to make a solenoid type coil in an electric bulb. In the electric equipment producing heat e. For electric power transmission, copper or aluminium wire is used.

In practice the unit kWh is used for the measurement of electrical energy, rather than joule. Tungsten metal is used to make a solenoid type coil in an electric bulb because its melting point is very high. Thus, when a high amount of current is passed through it, it becomes red hot and emit lights without getting burnt. In the electric equipment producing heat, such as iron, electric heater, boiler, toaster etc.

Thus, the power loss in the low resistance transmission wire will be less. In practice, the unit kWh is used for the measurement of electrical energy, rather than joule. This is because joule is a very small unit and the energy consumption in day to day life is very large i. Thus, to reduce the complexity of handling such large figures, a bigger unit was required.

Which of the statement given below correctly describes the magnetic field near a long, straight current carrying conductor? The magnetic lines of force are in a plane, perpendicular to the conductor in the form of straight lines.

The magnetic lines of force are parallel to the conductor on all the sides of conductor. The magnetic lines of force are perpendicular to the conductor going radially outword. The magnetic lines of force are in concentric circles with the wire as the center, in a plane perpendicular to the conductor. What is a solenoid? Compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet. Draw neat figures and name various components. A solenoid is a long straight insulated wire, such as a copper coil, often wrapped around a cylinder-shaped body.

The diameter of the solenoid is lesser than its length. It produces a magnetic field when electric current is passed through it. Magnetic field produced by a solenoid is shown below: Magnetic field produced by a bar magnet is shown below: On comparing field lines produced by a solenoid with that produced by a bar magnet, we observe that they are very much identical.

Thus, a solenoid acts as a bar magnet when current is passed through it. Name the following diagrams and explain the concept behind them. It represents Fleming's right hand rule used for finding the direction of induced current with respect to the directions of the magnetic field and motion of the conductor. The direction of current induced in a conductor can be obtained by holding the thumb, the index finger, and the middle finger of your right hand mutually perpendicular to each other.

In this situation, the thumb indicates the direction of the motion of the conductor, the index finger points along the magnetic field, and the middle finger points along the current induced in the conductor.

This rule states that if you stretch the thumb, index finger, and middle finger of your left hand such that they are mutually perpendicular to each other, then your index finger represents the direction of the field, the middle finger represents the direction of the current, and the thumb represents the direction of the force experienced by the conductor.

Identify the figures and explain their use. An electric fuse is a safety device that protects the wiring against excessive heating caused by an excess supply of current. An MCB is a device which functions as a fuse, but does not require replacement. MCB falls down to break the circuit when heavy amount of current flows through it. Once the fault is rectified, the MCB is reset. It is a device that generates electricity by rotating its rotor in a magnetic field.

Solve the following example. Heat energy is being produced in a resistance in a circuit at the rate of W.

## Tell the odd one one out. give proper explanation. voltmeter, ammeter, galvanometer, thermometer.

Nice post! This is a very nice that I will definitively come back to more times this year! Thanks for informative post. Science Curriculum. Odd Man Out.

The questions posted on the site are solely user generated, Doubtnut has no ownership or control over the nature and content of those questions. Doubtnut is not responsible for any discrepancies concerning the duplicity of content over those questions. Study Materials.

Solution : Thermometer. It measures temperature, the remaining three measure electrical quantities. Students to be promoted on the basis of internal assessment. CBSE has released syllabus for class 11 and 12 applied maths textbook CBSE board has released the syllabus as well as the complete handbook for the subject.

## Volmeter,a meter,galvanometer, thermometer tell the odd one out give proper explanation

By using this site, you consent to the use of cookies. You can refuse to use cookies by setting the necessary parameters in your browser. English , Tell the odd one one out. Answers: 2. The correct answer was given: sana Thermometer is odd one because thermometer is used for checking the temperature of body. The correct answer was given: srabani80pal.

Will the mass and weight of an object on the earth be same as their values on Mars? How did they help Newton to arrive at the inverse square law of gravity? Show that the time taken to go up is same as the time taken to come down. What is the value of g on the planet?

In the electric equipment producing heat e.

These solutions for Effects Of Electric Current are extremely popular among Class 10 students for Science Effects Of Electric Current Solutions come handy for quickly completing your homework and preparing for exams. Tell the odd one out. Give proper explanation.

### Voltmeter , Ammeter, Galvanometer, Thermometer.

Explanation: Fuse wire, rubber gloves, and generator are related to electric current. If a large amount of electric current flows it produce large amount of heat so fuse wire melts thus stopping the flow of current. Rubber gloves do not conduct heat or electricity which we wear while handling electrical equipment to protect from shocks. The generator is based on magnetic effects of electric current which converts mechanical energy into electrical energy.

SEE VIDEO BY TOPIC: Least count of all type ammeter voltmeter

Code , see. The present invention relates to'an A. The increasing use of electric energy for aircraft, induction furnaces, and induction heating, and the greater accuracy required in measurements in electronics have led to increasing demands for accurate ammeters and voltmeters for use at frequencies extending upward from power frequencies through the entire audio-frequency range. There are several methods for accurately measuring alternating currents and voltages. Perhaps the most common is the accurate electro-dynamic alternating-current meter.

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12 Capiler odd- leg firm joint mm. 26 Leg made out of 25x25x18G Square Tube & 18 mm pre-laminated board. 5 1 AC moving iron type ammeter(various ranges)Portable AC moving iron voltmeter laboratory type for horizontal use. Output: mA DC and one adjustable set point and relay o/p with LED Indicator.

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