Current Electri...

If the ammeter in the given circuit reads 2A, the resistance R is

A 6 volt battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be

Resistances n, each of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohm, equal to

In the circuit Fig. E = 6.0 V, R₁ = 100 Ω, R₂ = R₃ 50Ω, R₄ = 75Ω. The equivalent resistance of the circuit in ohm, is

A uniform wire of resistance 36 ohm is bent in the form of a circle. The effective resistance across the points A and B is

In, the given circuit R₁ = 20 Ω, R₂ = 40 Ω, R₃ = 60 Ω, R₄ = 180 Ω, C = 5µF and E = 6 volt. The switch S has been closed for a long time. What is the charge on the capacitor ?

A part of circuit shown in Fig. the potential difference across A and B is

Voltmeter has a resistance of 20 kΩ. When it is connected in series with a resistance R across a 230 V supply, it reads 200 V. what is the value of R ?

The charge flowing in a conductor varies with time as Q= at – bt², then the current

Two cells of unequal emfs E₁ and E₂ and internal resistances r₁ and r₂ are joined as shown in fig. V_P and V_Q are the potential at P and Q respectively.