AIIMS UG Current Electricity — practice questions
24 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AIIMS UG Current Electricity in the app →Electric current is defined as the rate of flow of:In the given circuit, it is observed that the current $I$ is independent of the value of the resistance $R_{6}A resistor carries a current of 2 A when a potential difference of 10 V is applied across it. Its resistance iThe SI unit of current density is:For a uniform wire of resistance R = ρl/A, the resistivity ρ depends on:When an electric field E is applied along a metallic conductor, the conduction electrons acquire a drift velocThe power dissipated in a resistor of resistance R carrying a steady current I is:The emf of a cell is equal to the potential difference across its terminals when:Estimate the drift speed of electrons in a copper wire carrying 1.5 A with cross-section 1.0×10⁻⁷ m² and n = 8A nichrome heating element has resistance 75.3 Ω at 27°C. On a 230 V supply it settles to a steady current of Two cells, each of emf 1.5 V and internal resistance 0.5 Ω, are connected in series across a 2 Ω resistor. TheTwo identical cells, each of emf 1.5 V and internal resistance 0.5 Ω, are connected in parallel across a 1 Ω rThe maximum current that can be drawn from a cell of emf 1.5 V and internal resistance 0.3 Ω is:Power loss in transmission cables of resistance Rc delivering power P at voltage V is P²Rc/V². To minimise thiAt a junction, currents of 3 A and 5 A flow in, and 2 A flows out through one branch. By Kirchhoff's junction A Wheatstone bridge is balanced with arms P = 10 Ω, Q = 20 Ω and R = 15 Ω. The unknown resistance S is:A 3 Ω resistor is connected in series with a parallel combination of a 6 Ω and a 3 Ω resistor. The equivalent When the temperature of a metallic conductor rises, its resistivity increases mainly because:A bulb of resistance $240$ $\Omega$ is connected across $120$ V. Current through it is:A cell of EMF $1.5$ V and internal resistance $0.5\ \Omega$ delivers $1$ A to a bulb. Terminal voltage is:Ohm's law gives the relation between V, I, R as:Resistance R of a wire depends on its length L, area A, and resistivity ρ as:Resistivity of a typical metallic conductor as temperature increases:A galvanometer of resistance G can be converted into a voltmeter of range V by connecting in series a high res