Magnetic Effects of Electric Current — Science STD 10 — Question

Consider two statements A and B given below:

1. Real image is always inverted.
2. Virtual image is always erect.

Out of these two statements:

To focus the image of a nearby object on the retina of an eye:

If the current in a wire is directed east wards and it is kept in a magnetic field directed northwards, the direction of force on the wire is:

The current passing through an electric kettle has been doubled. The heat produced will become:

While performing the experiment on tracing the path of a ray of light through a rectangular glass slab, in which of the following experimental set-ups is a student likely to get best results? P₁ and P₂ are the positions of pins fixed by him.

Solar cells are made of:

1. Conductors.
2. Insulators.
3. Semi-conductors.
4. Super-conductors.

Work done to move 1 coulomb charge from one point to another point on a charged conductor having potential 10 volt is:

Current in circuit, which makes bulb glow or heats up the wire, is:

The phenomenon of electromagnetic induction is:

According to New Cartesian Sign Convention:

1. Focal length of concave mirror is positive and that of convex mirror is negative.
2. Focal length of both concave and convex mirrors is positive.
3. Focal length of both concave and convex mirrors is negative.
4. Focal length of concave mirror is negative and that of convex mirror is positive.