Physics
Grade-10
Easy
Question
The split rings are also known as ____.
- Brushes
- Armature
- Commutator
- Magnets
Hint:
Split rings are also called commutators.
The correct answer is: Commutator
The split rings are also known as commutators.
- The split rings are the simple, circular or cylindrical shell coils that change the direction of current flow in generators.
- They reverse the current flow in DC generators to let them flow in a uniform single direction.
- The split rings are also called commutators.
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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?
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Electric generators can produce
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The essential difference between an A.C. generator and a D.C. generator is that
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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.
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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
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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
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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
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Consider a coil and a magnet.
Current is induced in the coil when:
I. coil and magnet both are at rest.
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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:
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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:
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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
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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:
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A current can be induced in a coil by:
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Electromagnetic induction is defined as the following:
Electromagnetic induction is defined as the following:
PhysicsGrade-10
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In a magnetic field, a rectangular coil of copper wires is rotated. Once in each rotation, the direction of induced current changes.
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The rectangular coil of the electric generator executes ______ motion.
The rectangular coil of the electric generator executes ______ motion.
PhysicsGrade-10
