POST OUTREACH 2025

Find the effective resistance of the three resistors connected in series where R₁ = 20 Ω, R₂ = 4 Ω and R₃ = 15 Ω.

• 39 Ω

• 0.039 Ω

• 3.9 Ω

• 390 Ω

If two resistors of 5 Ω and 15 Ω are connected in parallel. What is the equivalent resistance in circuit ?

• 0.375 Ω

• 1.5 Ω

• 3.75 Ω

• 115 Ω

An electrician wishes to cut a copper wire (ρ=1.724∗x10−8Ωm) that has 10Ω of resistance. The wire has a radius of 0.725mm. Approximately what length of wire ?

• 9.6 m

• 10 cm

• 960 m

• 2.6 cm

An EMF source of 8.0 V is connected to a purely resistive electrical appliance (a light bulb). An electric current of 2.0 A flows through it. Consider the conducting wires to be resistance-free. Calculate the resistance offered by the electrical appliance.

• 40 Ω

• 3.2 Ω

• 0.4 Ω

• 4 Ω

If 1000 μC of charge particles transferred between two terminals at 1 hour, how much current will produce?

• 2.77 A

• 0.277 A

• 0.33 A

• 27.77 A