English

The device used for producing electric current is called a ______.

Advertisements
Advertisements

Question

The device used for producing electric current is called a ______.

Options

  • generator

  • galvanometer

  • ammeter

  • motor

MCQ
Fill in the Blanks
Advertisements

Solution

The device used for producing electric current is called a generator.

Explanation:

  • A generator is a device that transforms mechanical energy into electrical energy.
  • A galvanometer is a device that detects the existence of electricity in a circuit.
  • An ammeter is a device that measures the amount of electric current flowing across a circuit.
  • A motor is a piece of machinery that turns electrical energy into mechanical energy.

As a result, the generator is the correct solution.

shaalaa.com
  Is there an error in this question or solution?
Chapter 10: Electromagnetism - EXERCISE [Page 251]

APPEARS IN

Lakhmir Singh Physics [English] Class 10 ICSE
Chapter 10 Electromagnetism
EXERCISE | Q 3. | Page 251

RELATED QUESTIONS

A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each______.


What is the function of brushes in an electric generator?


Why are Thermal Power Stations usually located near a river?


Complete the following sentence: 

A generator with commutator produces ............... current. 


 Explain the principle of an electric generator. 


Each one of the following changes will increase emf (or voltage) in a simple generator except: 

(a) increasing the number of turns in the armature coil
(b) winding the coil on a soft iron armature
(c) increasing the size of the gap in which the armature turns
(d) increasing the speed of rotation


A d.c. generator is based on the principle of:

(a) electrochemical induction
(b) electromagnetic induction
(c) magnetic effect of current
(d) heating effect of current 


What determines the frequency of a.c. produced in a generator?


A flat coil of wire rotates at a constant speed about an axis perpendicular to a uniform magnetic field. Draw a graph to show how the induced e.m.f. varies relative to the positions of the coil during its one complete rotation. At what position of the coil, the e.m.f. has the maximum value?


The given figures 1 to 3 show the working of a simple A.C. generator. Study the diagrams and answers of the following questions.

(i) State and explain the principle underlying the working of a simple generator.
(ii) Where is the loop of wire placed?
(iii) What happens when the loop is rotated?
(iv) Indicate the direction of the current flow through the wire for the first half of the turn (in first figure). Name and state the rule used in finding the direction of the current.
(v) Indicate the direction of the current for the case shown in second figure. 
(vi) Indicate the direction of current in the outer circuit (i.e., electric bulb) in first and third figure.
(vii) What type of current is shown in the above diagrams? Explain.


State true or false:

The frequency of AC is 50 Hz.


Draw and label the diagram of an AC generator.


A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is withdrawn from inside the coil?


A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is held stationary inside the coil?


An AC generator is provided with ______ slip rings that rotate with the coil.


Which principle is used by an a.c. generator to produce electrical energy?


Under what condition is an EMF induced in a closed coil?


What causes a continuously alternating EMF in an a.c. generator?


What are the number of turns and area specified for the armature coil?


What is the field magnet made of, and what does it provide?


Which is the standard form of the alternating EMF?


How is angular speed related to frequency of rotation \[n\]?


What is the frequency of rotation of the stationary-bicycle generator's coil?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×