Untitled Quiz

1. The unit of electric current is:

• a) Volt

• b) Coulomb

• c) Ampere

• d) Ohm

2. The resistance of a wire depends on:

• a) Length of the wire

• b) Area of cross-section

• c) Material of the wire

• d) All of the above

3. The power of a lens with a focal length of 50 cm is:

• a) 2 diopters

• b) -2 diopters

• c) 0.5 diopters

• d) -0.5 diopters

4. The phenomenon responsible for the blue color of the sky is:

• a) Reflection

• b) Refraction

• c) Scattering of light

• d) Dispersion

5. In a concave mirror, when the object is placed at the center of curvature, the image formed is:

• a) Virtual and erect

• b) Real, inverted, and same size as the object

• c) Real, inverted, and diminished

• d) Virtual, erect, and magnified