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Resistance in a Parallel Circuit?
In a parallel configuration of two resistors, one with a resistance of 10 Ω and the other with a resistance of 20 Ω, a voltage of 20 V is applied across each. How do the equivalent resistance and current through each resistor compare to their individual values?
Magnetic Field and Torque?
A bar magnet of length 10 cm is placed inside a solenoid of 100 turns per meter. If the solenoid carries a current of 2 A, what is the magnitude of the torque experienced by the bar magnet? Assume the magnetic moment of the bar magnet is 0.5 A·m².
Resistors in Parallel: A Conundrum
Three identical light bulbs, each with a resistance of 10 ohms, are connected in parallel across a 100-volt power source. If two of the bulbs are removed, how will the equivalent resistance of the remaining configuration change, and what will be the new current through the circuit?
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