A 10-ohm resistor and a 20-ohm resistor are connected in series to a voltage source. When the current through the 10-ohm resistor is 2 amperes, what is the current through the 20-ohm resistor?

3. a particle with initial velocity v⃗ 0=(5.85×103m/s)j^ enters a region of uniform electric and magnetic fields. the magnetic field in the region is b⃗ =−(1.35t)k^. you can ignore the weight of the particle. a. calculate the magnitude of the electric field in the region if the particle is to pass through undeflected, for a particle of charge +0.640 nc.