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 \({\text{Generator}} \).
The maximum percentage error in the equivalent resistance of two parallel connected resistors of 100 \( \Omega \) and 900 \( \Omega \), with each having a maximum 5% error, is: \[ {(round off to nearest integer value).} \]
The induced emf in a 3.3 kV, 4-pole, 3-phase star-connected synchronous motor is considered to be equal and in phase with the terminal voltage under no-load condition. On application of a mechanical load, the induced emf phasor is deflected by an angle of \( 2^\circ \) mechanical with respect to the terminal voltage phasor. If the synchronous reactance is \( 2 \, \Omega \), and stator resistance is negligible, then the motor armature current magnitude, in amperes, during loaded condition is closest to: \[ {(round off to two decimal places).} \]
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 mV/\(\Omega\), 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 \( h(0) = \underline{\hspace{2cm}} \) (round off to the nearest integer).
Using shunt capacitors, the power factor of a 3-phase, 4 kV induction motor (drawing 390 kVA at 0.77 pf lag) is to be corrected to 0.85 pf lag. The line current of the capacitor bank, in A, is _____________ (round off to one decimal place).