A parallel-plate capacitor of capacitance C₁ is made using two gold plates. Another parallel-plate capacitor of capacitance C₂ is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rhog and rhoa are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct?

Two wires are made having same length l and area of cross-section A. Wire 1 is made of copper and wire 2 is made of aluminium. It is given that the electrical conductivity of copper is more than that…

An electrical circuit having combinations of resistances and capacitance is given below. The current, flowing through the circuit will be: Circuit details: A 10 V DC source is connected to a parallel…

Which of the following statements are correct about the electrical resistance and resistivity of a wire? 1. Both quantities depend on the area of cross-section of the wire 2. Both depend on the tempe…

Two resistors R1 and R2, arranged in parallel combination in an electrical closed circuit are made of the same material and of same thickness. If the length of R2 is twice the length of R1, then the…

A parallel-plate capacitor, with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the val…