Current electricity questions | form six Physics

Why is a Wheatstone bridge not suitable for measuring very high resistance?

Answer / Solution

UNSOLVED

Study the circuit diagram in Figure1 then answer the questions that follow:

If the value of R​₁​=R_​2​=R₃​=R​₄​=1.0Ω, R​₅​=2Ω, E₂​=E​_3​=4V, E​₁​=2.0V, calculate the;
(i) Current flowing through the circuit.
(ii) Potential difference, V_​ab​.

Answer / Solution

UNSOLVED

List two factors on which the resistivity of a material depends.

Answer / Solution

UNSOLVED

A wire of resistivity ρ is stretched to double its length, what will be its new resistivity?
Give reason for your answer.

Answer / Solution

UNSOLVED

Why a high voltage supply should have high internal resistance?

Answer / Solution

UNSOLVED