Home
Class 12
PHYSICS
A battery of emf E and internal resistan...

A battery of emf E and internal resistance r is connected to a variable resistor R as shown in figure. Which one of the following is true ?

A

Potenital difference across the terminals of the battery is maximum, when R=r

B

Power delivered to the resistor is maximum when R=r

C

Current in the circuit is maximum when R=r

D

Current in the circuit is maximum when `R gt gt r`

Text Solution

Verified by Experts

The correct Answer is:
C
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    BITSAT GUIDE|Exercise Bitsat Archives|26 Videos
  • CATHODE RAY, PHOTOELECTRIC EFFECT AND X-RAYS

    BITSAT GUIDE|Exercise BITSAT Archives|6 Videos
  • ELECTRIC CAPACITOR

    BITSAT GUIDE|Exercise BITSAT archives|6 Videos

Similar Questions

Explore conceptually related problems

.A cell of emf E and internal resistance r is connected across a variable resistor. Plot a graph showing variation of terminal voltage V of cell versus the current.

A solenoid of inductance L with resistance r is connected in parallel to a resistance R . A battery of emf E and of negligible internal resistance is connected across the parallel combination as shown in the figure. At time t = 0 , switch S is opened, calculate (a) current through the solenoid after the switch is opened. (b) amount of heat generated in the solenoid.

Knowledge Check

  • A battery of e.m.f. E and internal resistance r is connected to a variable resistor R as shown here. Which one of the following is true

    A
    Potential difference across the terminal of the battery is maximum when `R= r`
    B
    Power delivered to the resistor is maximum when `R = r`
    C
    Current in the circuit is maximum when `R= r`
    D
    Current in the circuit is maximum when `R gt gt t`
  • A battery of e mf 10 V and internal resistance 3Omega is connected to a resistor as shown in the figure. If the current in the circuit is 0.5 A . then the resistance of the resistor will be

    A
    `19 Omega`
    B
    `17 Omega`
    C
    `10 Omega`
    D
    `12 Omega`
  • A cell of emf 'E' and internal resistance 'r' is connected to a variable external resistor 'R'. The graph which gives the terminal voltage of cell 'V' with respect to R is :

    A
    B
    C
    D
  • Similar Questions

    Explore conceptually related problems

    If a battery of emf E and internal resistance r is connected across a load of resistance R . Shot that the rate at which energy is dissipated in R is maximum when R = r and this maximur power is P = E^2//4r .

    A battery of e.m.f. 10 V and internal resistance 0.5 ohm is connected across a variable resistance R . The value of R for which the power delivered in it is maximum is given by

    A battery of emf E and internal resistance r is connected to a resistor of restance r_(1) and Q Joules of heat is produced in a certain time t . When te same battery is connected to another resistor of resistance r_(2) the same quantity of heat is produced in the same time t . Then the value of r is

    A battery of emf 15 V and internal resistance of 4Omega is connected to a resistor. If the current in the circuit is 2A and the circuit is closed. Resistance of the resistor and terminal voltage of the battery will be

    A 5V battery with internal resistance 2Omega and a 2V battery with internal resistance 1Omega are connected to a 10Omega resistor as shown in the figure. The current in the 10Omega resistor is