
To solve the problem, we need to identify which device converts mechanical energy into electrical energy.
1. Understanding Energy Conversions:
- A motor converts electrical energy into mechanical energy.
- A battery stores and provides chemical energy converted to electrical energy.
- A switch simply opens or closes an electrical circuit; it doesn’t convert energy.
- A generator converts mechanical energy into electrical energy using electromagnetic induction.
2. Correct Option:
The device that performs the required conversion is the generator.
Final Answer:
The correct answer is \({\text{Generator}} \).
In the Wheatstone bridge shown below, the sensitivity of the bridge in terms of change in balancing voltage \( E \) for unit change in the resistance \( R \), in V/Ω, is __________ (round off to two decimal places).

An ideal low pass filter has frequency response given by \[ H(j\omega) = \begin{cases} 1, & |\omega| \leq 200\pi \\ 0, & \text{otherwise} \end{cases} \] Let \( h(t) \) be its time domain representation. Then h(0) = _________ (round off to the nearest integer).