Refer to the following diagram to answer this question in the diagram, if the lightbulb is placed at d and b is closed( as shown) what will happen.

When light bulb is placed at the position of D and switch B is closed

So here the circuit is closed and there will be current flow through the circuit

So here we can use ohm's law

here we have

V = voltage of battery

R = resistance of bulb

so we will got the current "i" in the circuit

so now we will have power across the bulb as

so bulb will glow with the power we got in above expression after connecting into the circuit

this would be about 43%