Physics
Assertion (A): Same current flows through the live wires and the filament of a bulb, but the heat produced in the filament is much higher.
Reason (R): The filament of a bulb is made of low resistance and high melting point.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Current Electricity
3 Likes
Answer
assertion is true but reason is false.
Explanation
Assertion (A) is true. Same current flows through the live wires and the filament of a bulb, but the heat produced in the filament is much higher. This is due to the higher resistance of the filament compared to the live wires, leading to greater heat generation in the filament.
Reason (R) is false. The filament of a bulb is not made of a material with low resistance. In fact, the filament is specifically designed to have a relatively high resistance. This high resistance allows it to produce light efficiently by converting electrical energy into heat and then into light.
Answered By
1 Like
Related Questions
Assertion (A): The principle of the method of mixtures involves mixing substances at different temperatures to find the final temperature.
Reason (R): The law of conservation of energy states that the energy is neither created nor destroyed in an isolated system.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): A transformer can increase the voltage of an alternating e.m.f.
Reason (R): This is achieved by keeping the number of turns in the secondary coil less than the number of turns in the primary coil.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): A transformer cannot be used with a direct current.
Reason (R): The lamination of core prevents the loss of energy due to induced currents in the core.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Assertion (A): The magnitude of induced e.m.f. becomes maximum when the magnetic flux linked with the coil reduces to zero from its maximum value.
Reason (R): This happens when the plane of the coil lies in the direction of the magnetic field.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.