134

You visited us 134 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Resistance and Resistivity

The formula f...

Question

The formula for dynamic resistance is

V / I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Δ V / Δ I

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

V / Δ I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Δ V / I

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $Δ V / Δ I$
Dynamic resistance, $r = Δ V / Δ I$

Suggest Corrections

Similar questions

Q. In a device

I = 40 μ A [e^{V / V_{T}} - 1]

where

V_{T} = 0.025 V

. Find the dynamic resistance when

V = 0.5 V

Q. In an a.c circuit, the resistance

R = 0.2 Ω

. At a certain instant

V_{A} - V_{B} = 0.5 V, i = 0.5 A

and the current

i

is increasing at the rate of

\frac{Δ i}{Δ t} = 8 {As}^{- 1}

. The inductance of the coil is

Q. When the temperature of a body increases form t to

t + Δ t

, its moment of inertia increases from I to

I + Δ I

. The coefficient of linear expansion of the body is

α

. The ratio

Δ I / I

is :

When the temperature of a rod increases from $t$ to $t + Δ t$ , the moment of inertia of the rod increases from $I$ to $I + Δ I$ . If the coefficient of linear expansion of the rod is $α$ , the ratio $\frac{Δ I}{I}$ is

Q. Output characteristics of an

n - p - n

transistor in

C E

configuration is shown in the figure. Determine:
(i) dynamic output resistance
(ii) dc current gain and
(iii) ac current gain at an operating point

V_{C E} = 10 V

, when

I_{B} = 30 μ A

Join BYJU'S Learning Program

The formula for dynamic resistance is

The correct option is B ΔV/ΔIDynamic resistance, r=ΔV/ΔI

The correct option is B $Δ V / Δ I$
Dynamic resistance, $r = Δ V / Δ I$