Magnetic Effects of Electric Current — Science STD 10 — Question

Which of the following figures shows the correct magnetic field lines?

The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be:

A student obtained a sharp inverted image of a distant tree on a screen placed in front of the concave mirror. He then removed the screen and tried to look into the mirror. He would now see

On the basis of their experiment, "To trace the path of a ray of light through a rectangular glass slab," students of a class arrived at which one of the following conclusions:

A converging lens is used to produce an image of an object on a screen,object on a screen. What change is needed for the image to be formed nearer to the lens?

A car headlamp of 48W works on the car battery of 12V. The correct fuse for the circuit of this car headlamp will be:

1. 5A
2. 10A
3. 3A
4. 13A

To find the focal length of a concave mirror Rahul focuses a distant object with this mirror. The chosen object should be:

A student traces the path of a ray of light through a triangular glass prism for different values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

Choose the correct option.
The magnetic field inside a long straight solenoid-carrying current,