155374
The quantity, which remain unchanged in a transformer, is
1 voltage
2 current
3 frequency
4 None of these
Explanation:
C Power is conserved in the transformer. The product of the voltage and current remains the same in both coils. This means that the quantity that remains unchanged in a transformer is the apparent power which is the product of the voltage and current in each coil. In other words, the transformer only changes the voltage and current but unchanged the frequency to avoid hysteresis and eddy current losses.
CG PET-22.05.2022
Alternating Current
155377
A transformer works on the principle of
1 Self-induction
2 Electrical inertia
3 Magnetic effect of electric current
4 Mutual induction
Explanation:
D A transformer is an electrical device that works on the principle of electromagnetic induction to transfer electrical energy from one circuit to another by means of mutual induction between two coils.
AP EAMCET (18.09.2020) Shift-I
Alternating Current
155378
The core used in a transformer is laminated in order to
1 increase magnetic field
2 increases residual magnetism
3 decreases the eddy currents in the core
4 increases the eddy currents in the core
Explanation:
C The core of transformer is typically made of ferromagnetic material such as iron or steel, which are excellent conductors of magnetic flux. When a transformer operates, the changing magnetic field in the core can induce electric current called eddy currents in the core material. The lamination are typically coated with a thin layer of insulating material such as varnish or oxide, to prevent the flow of eddy currents through the material. The laminated core also reduces the magnetic losses in the transformer, improving its efficiency and reducing heat generation.
TS EAMCET 29.09.2020
Alternating Current
155388
A step up transformer has turn ratio 10:1. A cell of emf $2 \mathrm{~V}$ is fed to the primary, then the secondary voltage developed is
1 $20 \mathrm{~V}$
2 $10 \mathrm{~V}$
3 $2 \mathrm{~V}$
4 zero
Explanation:
D Transformer works only on AC voltage. It can't work with DC supply. So, if a cell is connected to its primary then output across secondary is always zero.
155374
The quantity, which remain unchanged in a transformer, is
1 voltage
2 current
3 frequency
4 None of these
Explanation:
C Power is conserved in the transformer. The product of the voltage and current remains the same in both coils. This means that the quantity that remains unchanged in a transformer is the apparent power which is the product of the voltage and current in each coil. In other words, the transformer only changes the voltage and current but unchanged the frequency to avoid hysteresis and eddy current losses.
CG PET-22.05.2022
Alternating Current
155377
A transformer works on the principle of
1 Self-induction
2 Electrical inertia
3 Magnetic effect of electric current
4 Mutual induction
Explanation:
D A transformer is an electrical device that works on the principle of electromagnetic induction to transfer electrical energy from one circuit to another by means of mutual induction between two coils.
AP EAMCET (18.09.2020) Shift-I
Alternating Current
155378
The core used in a transformer is laminated in order to
1 increase magnetic field
2 increases residual magnetism
3 decreases the eddy currents in the core
4 increases the eddy currents in the core
Explanation:
C The core of transformer is typically made of ferromagnetic material such as iron or steel, which are excellent conductors of magnetic flux. When a transformer operates, the changing magnetic field in the core can induce electric current called eddy currents in the core material. The lamination are typically coated with a thin layer of insulating material such as varnish or oxide, to prevent the flow of eddy currents through the material. The laminated core also reduces the magnetic losses in the transformer, improving its efficiency and reducing heat generation.
TS EAMCET 29.09.2020
Alternating Current
155388
A step up transformer has turn ratio 10:1. A cell of emf $2 \mathrm{~V}$ is fed to the primary, then the secondary voltage developed is
1 $20 \mathrm{~V}$
2 $10 \mathrm{~V}$
3 $2 \mathrm{~V}$
4 zero
Explanation:
D Transformer works only on AC voltage. It can't work with DC supply. So, if a cell is connected to its primary then output across secondary is always zero.
155374
The quantity, which remain unchanged in a transformer, is
1 voltage
2 current
3 frequency
4 None of these
Explanation:
C Power is conserved in the transformer. The product of the voltage and current remains the same in both coils. This means that the quantity that remains unchanged in a transformer is the apparent power which is the product of the voltage and current in each coil. In other words, the transformer only changes the voltage and current but unchanged the frequency to avoid hysteresis and eddy current losses.
CG PET-22.05.2022
Alternating Current
155377
A transformer works on the principle of
1 Self-induction
2 Electrical inertia
3 Magnetic effect of electric current
4 Mutual induction
Explanation:
D A transformer is an electrical device that works on the principle of electromagnetic induction to transfer electrical energy from one circuit to another by means of mutual induction between two coils.
AP EAMCET (18.09.2020) Shift-I
Alternating Current
155378
The core used in a transformer is laminated in order to
1 increase magnetic field
2 increases residual magnetism
3 decreases the eddy currents in the core
4 increases the eddy currents in the core
Explanation:
C The core of transformer is typically made of ferromagnetic material such as iron or steel, which are excellent conductors of magnetic flux. When a transformer operates, the changing magnetic field in the core can induce electric current called eddy currents in the core material. The lamination are typically coated with a thin layer of insulating material such as varnish or oxide, to prevent the flow of eddy currents through the material. The laminated core also reduces the magnetic losses in the transformer, improving its efficiency and reducing heat generation.
TS EAMCET 29.09.2020
Alternating Current
155388
A step up transformer has turn ratio 10:1. A cell of emf $2 \mathrm{~V}$ is fed to the primary, then the secondary voltage developed is
1 $20 \mathrm{~V}$
2 $10 \mathrm{~V}$
3 $2 \mathrm{~V}$
4 zero
Explanation:
D Transformer works only on AC voltage. It can't work with DC supply. So, if a cell is connected to its primary then output across secondary is always zero.
155374
The quantity, which remain unchanged in a transformer, is
1 voltage
2 current
3 frequency
4 None of these
Explanation:
C Power is conserved in the transformer. The product of the voltage and current remains the same in both coils. This means that the quantity that remains unchanged in a transformer is the apparent power which is the product of the voltage and current in each coil. In other words, the transformer only changes the voltage and current but unchanged the frequency to avoid hysteresis and eddy current losses.
CG PET-22.05.2022
Alternating Current
155377
A transformer works on the principle of
1 Self-induction
2 Electrical inertia
3 Magnetic effect of electric current
4 Mutual induction
Explanation:
D A transformer is an electrical device that works on the principle of electromagnetic induction to transfer electrical energy from one circuit to another by means of mutual induction between two coils.
AP EAMCET (18.09.2020) Shift-I
Alternating Current
155378
The core used in a transformer is laminated in order to
1 increase magnetic field
2 increases residual magnetism
3 decreases the eddy currents in the core
4 increases the eddy currents in the core
Explanation:
C The core of transformer is typically made of ferromagnetic material such as iron or steel, which are excellent conductors of magnetic flux. When a transformer operates, the changing magnetic field in the core can induce electric current called eddy currents in the core material. The lamination are typically coated with a thin layer of insulating material such as varnish or oxide, to prevent the flow of eddy currents through the material. The laminated core also reduces the magnetic losses in the transformer, improving its efficiency and reducing heat generation.
TS EAMCET 29.09.2020
Alternating Current
155388
A step up transformer has turn ratio 10:1. A cell of emf $2 \mathrm{~V}$ is fed to the primary, then the secondary voltage developed is
1 $20 \mathrm{~V}$
2 $10 \mathrm{~V}$
3 $2 \mathrm{~V}$
4 zero
Explanation:
D Transformer works only on AC voltage. It can't work with DC supply. So, if a cell is connected to its primary then output across secondary is always zero.
