JEE Main · PhysicsMedium
A heater coil of resistance is cut into two equal parts and only one part is used in the heater. The heat generated will now be how many times the original heat ?
- A.
- B.
- C.
- D.
Show correct answer & step-by-step solution
Correct answer: C —
Solution
Power . If , then . Thus, the heat generated becomes twice the original.
Attempt this question & track your score
Sign up free to answer, get instant scoring, and let SolveGini track which Physics topics you need to revise.
Attempt & Track Free →More Current Electricity practice questions
- A wire of resistance 10 ohms is stretched to double its original length. What is the new resistance of the wire?
- What is the equivalent resistance of two resistors of 2 ohms and 4 ohms connected in series?
- According to Ohm's law, which of the following relations is correct?
- A current of 2 amperes flows through a conductor for 10 seconds. What is the total charge that passes through the conduc
- What is the power dissipated by a resistor of 5 ohms when a current of 2 amperes flows through it?
- A wire of resistance 10 ohms is stretched to twice its original length. What is the new resistance of the wire?
- In a potentiometer experiment, the balancing length for a cell of EMF 1.5 volts is 300 cm. If the cell is replaced by an
- A battery of EMF 12 volts and internal resistance 2 ohms is connected to an external resistor. If the current in the cir
- Three resistors of 2 ohms, 3 ohms, and 6 ohms are connected in parallel. What is the equivalent resistance of the combin
- A heater coil is cut into two equal parts and only one part is used in the heater. The heat generated will now be how ma
- In a potentiometer circuit, a cell of emf E is balanced by a length l. If the internal resistance of the cell is r and i