8 Questions
What is the SI unit of electric power?
Watt
In a series combination of resistors, how does the total resistance compare to the individual resistances?
It is equal to the sum of the individual resistances
What is the relationship between current passing through a conductor and its resistance, according to Ohm's law?
Directly proportional
What is the role of a prism in the dispersion of light?
Refraction of light
How does alternating current (AC) differ from direct current (DC)?
AC changes direction periodically, while DC flows in one direction only
What do magnetic field lines represent around a current-carrying conductor?
Magnetic flux density
How does a convex lens form an image compared to a concave lens?
Convex lens forms real and inverted images, while concave lens forms virtual and upright images
Why is AC preferred over DC for long-distance power transmission?
AC can easily be converted to higher voltages for transmission
Test your knowledge on electric current, potential difference, Ohm's law, resistance, resistivity, series and parallel combination of resistors, heating effect of electric current, electric power, and magnetic effects of current.
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