Physics
Grade-10
Easy
Question
Electric generators can produce
- Only AC current
- Only DC current
- Both AC and DC current
- No current
Hint:
The electrical generators can produce both AC and DC currents.
The correct answer is: Both AC and DC current
The electrical generators can produce both AC and DC currents.
- The electric generators can produce both AC and DC currents.
- An AC generator is used to power smaller electrical items such as coffee machines, computers, etc. while a DC generator is used to power larger electric motors.
- The AC generators use slip rings whereas the DC generators use split rings.
- The direction of current induction in both AC and DC can be related to Fleming's right-hand rule.
- In an AC generator, the electrical current reverses direction periodically while in a DC generator, the electrical current flows only in one direction. I
An AC generator is used to power smaller electrical items in your business – such as coffee machines, computers, etc. On the other hand, a DC generator is used to power larger electric motors, even as big as those used in subway systems.
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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
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
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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.
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Reason: A change of the magnetic field might cause an emf.
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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.
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
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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:
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PhysicsGrade-10
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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
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
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A current can be induced in a coil by:
A current can be induced in a coil by:
PhysicsGrade-10
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Electromagnetic induction is defined as the following:
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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.
In a magnetic field, a rectangular coil of copper wires is rotated. Once in each rotation, the direction of induced current changes.
PhysicsGrade-10
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The rectangular coil of the electric generator executes ______ motion.
The rectangular coil of the electric generator executes ______ motion.
PhysicsGrade-10
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No current gets induced in the coil when it is
No current gets induced in the coil when it is
PhysicsGrade-10
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The induced current in the coil placed in a magnetic field is zero 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 zero when the angle between the direction of motion of wire and the direction of the magnetic field is
PhysicsGrade-10
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In an electric generator, which force is used to rotate the coil?
In an electric generator, which force is used to rotate the coil?
PhysicsGrade-10
