Two conductors made of the same material are connected across a c… - Vidyadip

MCQ

Two conductors made of the same material are connected across a common potential difference. Conductor $A$ has twice the diameter and twice the length of conductor $B$. The power delivered to the two conductors ${P_A}$ and ${P_B}$ respectively is such that ${P_A}/{P_B}$ equals to

A
$0.5$
B
$1$
C
$1.5$
✓
$24$

✓

Answer

Correct option: D.

$24$

d
(d) $R = \rho \frac{l}{A}$and$P \propto \frac{1}{R}$$⇒$$P \propto \frac{A}{l}$$⇒$$P \propto \frac{{{d^2}}}{l}$ $⇒$${P_A} = 2{P_B}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

An alternating e.m.f. is applied to purely capacitive circuit. The phase relation between e.m.f. and current flowing in the circuit is orIn a circuit containing capacitance only

A ball whose density is $0.4 \times 10^3\,kg/m^3$ falls into water from a height of $9\,cm$ . To what depth does the ball sink ? ....... $cm$

The value of angle of dip is zero at the magnetic equator because on it

A spherical black body with a radius of $12\ cm$ radiates $450\ watt$ power at $500\ K$. If the radius were halved and the temperature doubled, the power radiated in watt would be

On adjusting the $P-N $junction diode in forward biased

A particle is placed at the origin and a force $F = kx$is acting on it (where $k$ is positive constant). If $U(0) = 0$, the graph of $U(x)$ versus x will be (where $U$ is the potential energy function)

Consider a rubber ball freely falling from a height $h =4.9\ m$ onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic.

Then the velocity as a function of time and the height as a function of time will be

$Assertion :$ In isothermal process whole of the heat supplied to the body is converted into internal energy.
$Reason :$ According to the first law of thermodynamics : $\Delta Q = \Delta U + p\Delta V$

Two vectors $\overrightarrow A $and $\overrightarrow B $lie in a plane, another vector $\overrightarrow C $lies outside this plane, then the resultant of these three vectors i.e.,$\overrightarrow A + \overrightarrow B + \overrightarrow C $

One quarter sector is cut from a uniform circular disc of radius $R$. This sector has mass $M$. It is made to rotate about a line perpendicular to its plane and passing through the centre of the original disc. Its moment of inertia about the axis of rotation is