alleryIf the current through a resistor is doubled, the heat produced in the same time becomes:
Aunchanged
Bfour times
Chalved
Ddoubled
Answer & Solution
Correct answer: B. four times
H = I²·R·t.
Doubling I makes I² four times, so heat is four times the original.
Keep practising Effects of Electric Current
Browse all Effects of Electric Current questions for Andhra Pradesh SSC (Class 10), or explore more Science topics.
Related questions
To convert an AC generator into DC generatorThe strength of magnetic field inside a long current carrying straight solenoid isThe resistivity does not change ifWhich of the following represents voltage?What is the minimum resistance which can be made using five resistors each of $1/5\ \OmegaWhat is the maximum resistance which can be made using five resistors each of $1/5\ \OmegaOrder the steps of motor operation (CBSE Cl 10)True or false on magnetism (CBSE Cl 10)