WB TET · Mathematics and Science (Paper II)
Electric current, circuits, magnets and electromagnetism.
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Q1 · Electricity and Magnetism · EASY
In an electric circuit, three resistors of 2 ohm, 3 ohm and 5 ohm are connected in series with a 10 volt battery. What is the total resistance in the circuit?
Q2 · Electricity and Magnetism · EASY
A student observes that when a current-carrying conductor is placed near a compass needle, the needle deflects. What does this observation demonstrate?
Q3 · Electricity and Magnetism · MEDIUM
An electric iron draws a current of 5 amperes from a 220 volt supply. If it is used for 2 hours daily, how much electrical energy is consumed in one day? (1 unit = 1 kWh)
Q4 · Electricity and Magnetism · HARD
Two bar magnets are placed with their north poles facing each other at a distance of 10 cm. When the distance between them is reduced to 5 cm, what happens to the force between them?
Q5 · Electricity and Magnetism · MEDIUM
In a parallel circuit, three resistors of 3Ω, 6Ω, and 9Ω are connected. What is the equivalent resistance?