Physics
Grade-10
Easy
Question
The following graph shows the _______ .
- AC
- DC
- Both AC and DC
- None of the above
Hint:
The given graphical representation shows the waveform of how alternating current (AC) varies with time.
The correct answer is: AC
The following graph shows AC.
- AC generators convert mechanical energy into electrical energy.
- It is based on the principle of Faraday's law of electromagnetic induction.
- The emf is generated when the coil is placed in a uniform magnetic field.
- Thus, the given graphical representation shows the induction of current in an AC generator.
Related Questions to study
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In a commercial electric generator, the two permanent magnets are replaced with
In a commercial electric generator, the two permanent magnets are replaced with
PhysicsGrade-10
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The direction of the induced current produced in a coil placed in a magnetic field depends on
The direction of the induced current produced in a coil placed in a magnetic field depends on
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The induced current in the coil placed in a magnetic field is maximum when the angle between the direction of motion of wire and the direction of the magnetic field is:
The induced current in the coil placed in a magnetic field is maximum when the angle between the direction of motion of wire and the direction of the magnetic field is:
PhysicsGrade-10
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The split rings are also known as ____.
The split rings are also known as ____.
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The device which converts mechanical energy into electrical energy is called a/an _____.
The device which converts mechanical energy into electrical energy is called a/an _____.
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When the plane of the armature of an AC generator is parallel to the field, in which is it rotating?
When the plane of the armature of an AC generator is parallel to the field, in which is it rotating?
PhysicsGrade-10
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Electric generators can produce
Electric generators can produce
PhysicsGrade-10
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The essential difference between an A.C. generator and a D.C. generator is that
The essential difference between an A.C. generator and a D.C. generator is that
PhysicsGrade-10
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Choose the correct option by reading the following statements: Assertion: The induced emf in a conducting loop of wire will be nonzero when it rotates in a uniform magnetic field. Reason: The emf is induced due to a change in magnetic flux.
Choose the correct option by reading the following statements: Assertion: The induced emf in a conducting loop of wire will be nonzero when it rotates in a uniform magnetic field. Reason: The emf is induced due to a change in magnetic flux.
PhysicsGrade-10
Physics
An induced emf is induced in the circuit whenever the magnetic flux is related to a coil change:
I. for short, the e.m.f. lasts
II. for an extended period of time
III. for as long as the flux is changing
The correct statement(s) is/are
An induced emf is induced in the circuit whenever the magnetic flux is related to a coil change:
I. for short, the e.m.f. lasts
II. for an extended period of time
III. for as long as the flux is changing
The correct statement(s) is/are
PhysicsGrade-10
Physics
Choose the correct option from the following statements.
Assertion: The movement of a conductor in a magnetic field can induce an emf.
Reason: A change of the magnetic field might cause an emf.
Choose the correct option from the following statements.
Assertion: The movement of a conductor in a magnetic field can induce an emf.
Reason: A change of the magnetic field might cause an emf.
PhysicsGrade-10
Physics
Consider a coil and a magnet.
Current is induced in the coil when:
I. coil and magnet both are at rest.
II. the coil is at rest and the magnet moves along x.
III. magnet is at rest and coil moves along x.
IV. both coil and magnet move along y with the same speed.
The correct statements are:
Consider a coil and a magnet.
Current is induced in the coil when:
I. coil and magnet both are at rest.
II. the coil is at rest and the magnet moves along x.
III. magnet is at rest and coil moves along x.
IV. both coil and magnet move along y with the same speed.
The correct statements are:
PhysicsGrade-10
Physics
When a bar magnet is pushed towards the coil connected in series with a galvanometer, the pointer in the galvanometer G:
When a bar magnet is pushed towards the coil connected in series with a galvanometer, the pointer in the galvanometer G:
PhysicsGrade-10
Physics
A loop is formed by connecting a coil of insulated copper wire to a galvanometer, and a magnet is:
A: Held stationary
B: Moved away along its axis
C: Moved along its axis
There will be an induced current in:
A loop is formed by connecting a coil of insulated copper wire to a galvanometer, and a magnet is:
A: Held stationary
B: Moved away along its axis
C: Moved along its axis
There will be an induced current in:
PhysicsGrade-10
