The circuit shows four resistors, each having resistance $R$. The resistance measured between point X and point Y is $120\,\Omega$ altogether. What is the value of the resistance $R$?
- A$30\,\Omega$
- B$90\,\Omega$
- C$160\,\Omega$
- D$480\,\Omega$
Physics 9702 · AS & A Level · Kirchhoff's laws