📚 Practice Mode

Electric Bell - Working Principle and Components

Learn at your own pace with hints and detailed explanations

1 / 20
Multiple Choice

An electric bell has a resistance of $5 \Omega$ and requires a current of $0.25\ A$ to work it. Assuming that the resistance of the bell wire is $1 \Omega$ per $15m$ and that the bell push is $90m$ distance from the bell. How many cells each of emf $1.4V$ and internal resistance $2 \Omega$, will be required to work the circuit.

  1. $3$
  2. $4$
  3. $5$
  4. $Can't\ be\ determined$
Change Mode