Overview

If the galvanometer $G$ does not show any deflection in the circuit shown, the value of $\mathrm{R}$ is given by:

'

The magnitude and direction of the current in the following circuit is

Two wires of same length and thickness having specific resistance 6 Ω cm and 3 Ω cm respectively are connected in parallel. The effective resistivity is ρ Ω cm. The value of ρ, to the nearest integer, is.

Consider a 72 cm long wire AB as shown in the figure. The galvanometer jockey is placed at P on AB at a distance x cm from A. The galvanometer shows zero deflection.

The value of x, to nearest integer, is.

Sea-water at a frequency f = 9 * 10² Hz, has permittivity ε = 80ε₀ and resistivity ρ = 0.25Ωm. Imagine a parallel plate capacitor is immersed in seawater and is driven by an alternating voltage source V(t) = V₀sin(2πft). Then the conduction current density become 10ˣ times the displacement current density after time t = 1/800 s. The value of x is ______. [Given: 1/(4πε₀) = 9 * 10⁹ Nm²C⁻²]

The equivalent resistance of series combination of two resistors is 's'. When they are connected in parallel, the equivalent resistance is 'p'. If s = np, then the minimum value for n is . (Round off to the Nearest Integer)

A current of 10 A exists in a wire of cross-sectional area of 5mm² with a drift velocity of 2*10⁻³ ms⁻¹. The number of free electrons in each cubic meter of the wire is ……………

A galvanometer of resistance G is converted into a voltmeter of range 0 - 1V by connecting a resistance R? in series with it. The additional resistance that should be connected in series with R? to increase the range of the voltmeter to 0 – 2V will b

Four resistance 40Ω, 60Ω, 90Ω, and 110Ω make the arms of a quadrilateral ABCD. Across AC is a battery of emf 40 V and internal resistance negligible. The potential difference across BD in V is

A circuit to verify Ohm's law uses ammeter and voltmeter in series or parallel connected correctly to the resistor. In the circuit: