Home
Class 12
PHYSICS
A resistor of resistance R is connected ...

A resistor of resistance R is connected to a cell internal resistance `5 Omega`. The value of R is varied from ` 1 Omega` to `5 Omega`. The power consumed by R

A

increases continusly

B

decreases continusly

C

first decreases then increases

D

first increases then decreases.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE - 1 (SECTION F- Electrical Instrument + Exp. Verifying ohm s law & Specific Resistance Using Meter Brige & Post Office + Potentiomenter (EMF & Int . Res.)|11 Videos

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE -2 (Level -I) SECTION A- Definition of Current , Current Density , Drift Velocity|6 Videos

  • CURRENT ELECTRICITY

    MOTION|Exercise EXERCISE - 1 SECTION C,D - Circuit theory, KCL & KVL, Battery , Grouping of cells|15 Videos

  • CONSTRAINED MOTION

    MOTION|Exercise EXAMPLES|12 Videos

  • ELASTICITY

    MOTION|Exercise EXERCISE -3|60 Videos

Similar Questions

Explore conceptually related problems

Statement I: When an external resistor of resistance R (connected across a cell to internal resistance r ) is varied, power consumed by resistance R is maximum when R = r. Statement II: Power consumed by a resistor of constant resistance R is maximum when current through it is maximum.

A resistance R whose value is varied from 1 Omega to 5 Omega is connected to a cell of internal resistance 3 Omega . The power consumed by R.

A battery of internal resistance 2 Omega is connected ot a variable resistor whose value can vary from 4 Omega to 10 Omega . The resistance is initially set at 4 Omega . If the resistance is now increased then

When two resistors of resistances R_1 and R_2 are connected in parallel, the net resistance is 3 Omega . When connected in series, its value is 16 Omega . Calculate the values of R_1 and R_2 .

(a) A cell of emf E and internal resistance r is connected to a resistance R . (i) Relate r and R , so that power in R is maximum. (ii) Maximum power consumed by R . (iii) Efficiency. (b) Find value r in terms of R so that power in external circuit is maximum. (c) A battery of internal resistance 4Omega is connected to the network of resistance as shown in the figure. what must be the value of R so that maximum power is delivered to the network? what is tha maximum power?

Two heating coils of resistance 10 Omega and 20 Omega are connected in parallel and connected to a battery of emf 12V and internal resistance 1 Omega . The power consumed by them is in the ratio

A battery of emf 3V and internal resistance r is connected in series with a resistor of 55 Omega through an ammeter of resistance 1 Omega . The ammeter reads 50 mA. Draw the circuit diagram and calculate the value of r.

A battery of emf 3 volt and internal resistance r is connected in series with a resistor of 55 Omega through an ammeter of resistance 1 Omega . The ammeter reads 50 mA. Draw the circuit diagram and calculate the value of r.

two heading coils of resistances 10Omega and 20 Omega are connected in parallel and connected to a battery of emf 12 V and internal resistance 1Omega Thele power consumed by the n are in the ratio