Physics-
General
Easy
Question
When a metallic plate swings between the poles of magnet
- No effect on the plate
- Eddy currents are set up inside the plate and the direction of the current is along the motion of the plate
- Eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
- Eddy currents are set up inside the plate
The correct answer is: Eddy currents are set up inside the plate and the direction of the current oppose the motion of the plate
Eddy currents are set up when a plate swings in a magnetic field. This opposes the motion
Related Questions to study
Physics-
A conducting rod of length is rotating with constant angular speed about its perpendicular bisector. A uniform magnetic field exists parallel to the axis of rotation. The e.m.f. induced between two ends of the rod is
A conducting rod of length is rotating with constant angular speed about its perpendicular bisector. A uniform magnetic field exists parallel to the axis of rotation. The e.m.f. induced between two ends of the rod is
Physics-General
Physics-General
Physics-
The output voltage of a transformer connected to line is at current. Its efficiency is 100%. The current coming from the line is
The output voltage of a transformer connected to line is at current. Its efficiency is 100%. The current coming from the line is
Physics-General
Physics-
A magnet is brought towards a coil (i) speedly (ii) slowly, then the induced e.m.f/induced charge will be respectively
A magnet is brought towards a coil (i) speedly (ii) slowly, then the induced e.m.f/induced charge will be respectively
Physics-General
Physics-
What is the self inductance of a solenoid of length 31.4 cm, area of cross-section and total number of turns
What is the self inductance of a solenoid of length 31.4 cm, area of cross-section and total number of turns
Physics-General
Physics-
A straight conductor of length moves at a speed of . When the conductor makes an angle of with the direction of magnetic field of induction of then induced emf is
A straight conductor of length moves at a speed of . When the conductor makes an angle of with the direction of magnetic field of induction of then induced emf is
Physics-General
Physics-
What should be the value of self inductance of an inductor that should be connected to 220 V, 50 Hz supply so that a maximum current of 0.9 A flows through it?
What should be the value of self inductance of an inductor that should be connected to 220 V, 50 Hz supply so that a maximum current of 0.9 A flows through it?
Physics-General
Physics-
There is an arial 1 m long in a car. It is moving from east to west with a velocity of 100 km. If the horizontal component of earth’s magnetic field is 0.18 gauss, this induced emfis nearly
There is an arial 1 m long in a car. It is moving from east to west with a velocity of 100 km. If the horizontal component of earth’s magnetic field is 0.18 gauss, this induced emfis nearly
Physics-General
Physics-
As shown in the figure, and are two coaxial conducting loops separated by some distance. When the switch is closed, a clockwise current flows in (as seen by ) and an induced current flows in . The switch remains closed for a long time. When is opened, a current flows in . Then the directions of and (as seen by ) are
As shown in the figure, and are two coaxial conducting loops separated by some distance. When the switch is closed, a clockwise current flows in (as seen by ) and an induced current flows in . The switch remains closed for a long time. When is opened, a current flows in . Then the directions of and (as seen by ) are
Physics-General
Physics-General
Physics-
From an inclined plane two particles are projected with same speed at same angle , one up and other down the plane as shown in figure. Which of the following statements is/are correct?
From an inclined plane two particles are projected with same speed at same angle , one up and other down the plane as shown in figure. Which of the following statements is/are correct?Physics-General
Physics-General
Physics-
A body of mass 1 kg is rotating in a vertical circle of radius 1m. What will be the difference in its kinetic energy at the top and bottom of the circle? (Take )
A body of mass 1 kg is rotating in a vertical circle of radius 1m. What will be the difference in its kinetic energy at the top and bottom of the circle? (Take )
Physics-General
Physics-
Two particles 1 and 2 are projected with same speed as shown in figure. Particle 2 is on the ground and particle 1 is at a height from the ground and at a horizontal distance from particle 2. If a graph is plotted between and for the condition of collision of the two then ( on -axis and on -axis
Two particles 1 and 2 are projected with same speed as shown in figure. Particle 2 is on the ground and particle 1 is at a height from the ground and at a horizontal distance from particle 2. If a graph is plotted between and for the condition of collision of the two then ( on -axis and on -axisPhysics-General
Physics-General
Physics-
A wheel of radius 1m rolls forward half a revolution on a horizontal ground. The magnitude to the displacement of the point of the wheel initially in contact with the ground is
A wheel of radius 1m rolls forward half a revolution on a horizontal ground. The magnitude to the displacement of the point of the wheel initially in contact with the ground is
Physics-General
Physics-
A bullet fired at an angle of with the horizontal hits the ground 3 km away. By adjusting its angle of projection, one can hope to hit a target 5 km away. Assume the muzzle speed to be same and the air resistance is negligible
A bullet fired at an angle of with the horizontal hits the ground 3 km away. By adjusting its angle of projection, one can hope to hit a target 5 km away. Assume the muzzle speed to be same and the air resistance is negligible
Physics-General
Physics-
A particle is moving in a circle of radius with constant speed , if radius is double then its centripetal force to keep the same speed should be
A particle is moving in a circle of radius with constant speed , if radius is double then its centripetal force to keep the same speed should be
Physics-General
Physics-
The average acceleration vector for a particle having a uniform circular motion is
The average acceleration vector for a particle having a uniform circular motion is
Physics-General