Home
Class 12
PHYSICS
A battery of e.m.f. E and internal resis...

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`

Text Solution

Verified by Experts

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

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    ERRORLESS |Exercise Kirchhoff s Law, cells|8 Videos

  • CURRENT ELECTRICITY

    ERRORLESS |Exercise Different Measuring Instruments|1 Videos

  • COMMUNICATION SYSTEM

    ERRORLESS |Exercise S E T|14 Videos

  • ELECTRO MAGNETIC INDUCTION

    ERRORLESS |Exercise SET|20 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.

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 .

Knowledge Check

  • 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`

  • 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
    `2.0 ohm`
    B
    `0.25 ohm`
    C
    `1.0 ohm`
    D
    `0.5 ohm`

  • 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`

    • Similar Questions

    Explore conceptually related problems

    A power supply with an e.m.f epsi and internal resustance r is connected to a variable resistance R. Find the dependence of the total power generated by the supply and of the power delivered to the external circuit on the load resistance.

    A battery of e.m.f 10V and internal resistance 3Omega is connected to a resistor.If the current in the circuit is 0.5A,then the resistance of the resistor is

    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 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 cell of e.m.f. 2V and negligible internal resistance is connected to resistor R_(1) and R_(2) as shown in the figure. The resistance of the Voltmeter R_(1) and R_(2) are 80Omega,40Omega and 80Omega respectively. The reading of the voltmeter is:-

    Home
    Profile