Recent questions in Physics

0 votes

0 answers

AC Generator An AC generator produces electrical energy from mechanical work, just the opposite of what a motor does. In it, a shaft is rotated by some mechanical means, such as an engine or a turbine starts working and an emf is induced in the coil.It is based on the phenomenon of electromagnetic induction which states that whenever magnetic flux linked with a conductor (or coil) changes, an emf is induced in the coil. Which method is used to induce an emf or current in a loop in AC

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

AC Generator An AC generator produces electrical energy from mechanical work, just the opposite of what a motor does. In it, a shaft is rotated by some mechanical means, such as an engine or a turbine starts working and an emf is induced in the coil.It is based on the phenomenon of electromagnetic induction which states that whenever magnetic flux linked with a conductor (or coil) changes, an emf is induced in the coil. When the coil is rotated with a constant angular speed `omega`, then the angle `theta` between the magnetic field vector B and the area vector `A`

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

AC Generator An AC generator produces electrical energy from mechanical work, just the opposite of what a motor does. In it, a shaft is rotated by some mechanical means, such as an engine or a turbine starts working and an emf is induced in the coil.It is based on the phenomenon of electromagnetic induction which states that whenever magnetic flux linked with a conductor (or coil) changes, an emf is induced in the coil. The change of flux is greatest at `theta` is equal to (take,`phi_B= NBAcos

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

AC Generator An AC generator produces electrical energy from mechanical work, just the opposite of what a motor does. In it, a shaft is rotated by some mechanical means, such as an engine or a turbine starts working and an emf is induced in the coil.It is based on the phenomenon of electromagnetic induction which states that whenever magnetic flux linked with a conductor (or coil) changes, an emf is induced in the coil. The graph below shows the voltage output plotted against time. Which point on the graph shows that the coil is in a vertical

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

AC Generator An AC generator produces electrical energy from mechanical work, just the opposite of what a motor does. In it, a shaft is rotated by some mechanical means, such as an engine or a turbine starts working and an emf is induced in the coil.It is based on the phenomenon of electromagnetic induction which states that whenever magnetic flux linked with a conductor (or coil) changes, an emf is induced in the coil. An AC generator consists of a coil of 1000 turns and cross-sectional area of `100 cm^2`, rotating at an angular speed of 100 rpm in a

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The Transformer Transformer is a device, which is used to increase or decrease the alternating voltage. The transformers are of the following types (i) Step-up transformer (ii) Step-down transformerTransformer is based upon the principle of mutual induction. It consists of two coils, primary coil `(p)` and secondary coil `(s)`, insulated from each other wounded on soft iron core.Often the primary coil is the input coil and secondary coil is the output coil. These soft iron cores are laminated to minimise eddy current loss.What is not possible in a

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The Transformer Transformer is a device, which is used to increase or decrease the alternating voltage. The transformers are of the following types (i) Step-up transformer (ii) Step-down transformerTransformer is based upon the principle of mutual induction. It consists of two coils, primary coil `(p)` and secondary coil `(s)`, insulated from each other wounded on soft iron core.Often the primary coil is the input coil and secondary coil is the output coil. These soft iron cores are laminated to minimise eddy current loss.Which quantities do not change during transformer

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The Transformer Transformer is a device, which is used to increase or decrease the alternating voltage. The transformers are of the following types (i) Step-up transformer (ii) Step-down transformerTransformer is based upon the principle of mutual induction. It consists of two coils, primary coil `(p)` and secondary coil `(s)`, insulated from each other wounded on soft iron core.Often the primary coil is the input coil and secondary coil is the output coil. These soft iron cores are laminated to minimise eddy current loss.A transformer has 150 turns in its primary and 1000 in secondary. If the primary is connected to

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The Transformer Transformer is a device, which is used to increase or decrease the alternating voltage. The transformers are of the following types (i) Step-up transformer (ii) Step-down transformerTransformer is based upon the principle of mutual induction. It consists of two coils, primary coil `(p)` and secondary coil `(s)`, insulated from each other wounded on soft iron core.Often the primary coil is the input coil and secondary coil is the output coil. These soft iron cores are laminated to minimise eddy current loss.The ratio of secondary to primary turns in an ideal transformer is 4 : 5. If power input

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The Transformer Transformer is a device, which is used to increase or decrease the alternating voltage. The transformers are of the following types (i) Step-up transformer (ii) Step-down transformerTransformer is based upon the principle of mutual induction. It consists of two coils, primary coil `(p)` and secondary coil `(s)`, insulated from each other wounded on soft iron core.Often the primary coil is the input coil and secondary coil is the output coil. These soft iron cores are laminated to minimise eddy current loss.A power transmission line feeds input power at `2300 V` to a step-down transformer with its primary windings

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Suppose that the lower half of the concave mirror’s reflecting surface in Fig. is covered with an opaque (non-reflective) material. What effect will this have on the image of an object placed in front of the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A mobile phone lies along the principal axis of a concave mirror, as shown in Fig. . Show by suitable diagram, the formation of its image. Explain why the magnification is not uniform. Will the distortion of image depend on the location of the phone with respect to the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Find the position, nature,and magnification of the image. An object is placed at 10

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Find the position, nature,and magnification of the image. An object is placed at 5 cm in front of a concave mirror of radius of curvature 15

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Suppose while sitting in a parked car, you notice a jogger approaching towards you in the side view mirror of R = 2 m. If the jogger is running at a speed of 5 m s–1, how fast the image of the jogger appear to move when the jogger is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by 1º when viewed from the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Light from a point source in air falls on a spherical glass surface (n = 1.5 and radius of curvature = 20 cm). The distance of the light source from the glass surface is 100 cm. At what position the image is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

Recent questions in Physics

Categories