Home
Class 12
PHYSICS
A : The voltage across a battery ma...

A : The voltage across a battery may be less, equal or more than the emf of the battery.
R : Voltage across a battery also depends on the magnitude and direction of current .

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark.

C

If Assertion is ture statement but Reason is false , then mark

D

If both Assertion and Reason are false statements then mark.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion (A) and the reason (R) provided in the statement. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that the voltage across a battery can be less than, equal to, or greater than the electromotive force (emf) of the battery. - This is true because the voltage across a battery (V) can vary depending on the conditions under which it is being used. 2. **Understanding the Reason (R)**: - The reason states that the voltage across a battery depends on the magnitude and direction of the current. - This is also true. The voltage across the battery can change based on how much current is flowing through the circuit and the direction of that current. 3. **Analyzing the Relationship**: - When current flows through a battery, there are internal resistances that affect the voltage. - If the current flows in the same direction as the emf, the voltage across the battery will be greater than the emf (V = E + IR). - If there is no current (I = 0), the voltage across the battery equals the emf (V = E). - If the current flows in the opposite direction, the voltage across the battery will be less than the emf (V = E - IR). 4. **Conclusion**: - Since both the assertion and the reason are true, and the reason correctly explains the assertion, we can conclude that the statement is valid. ### Final Answer: - The assertion (A) is true, and the reason (R) is true, and R is the correct explanation for A.
Promotional Banner

Similar Questions

Explore conceptually related problems

The terminal voltage across a battery of emf E can be

The EMF of Ni-Cad battery is dependent of :

A : Voltage drop or gain across a capacitor depends on the direction of current and increase opposite to the direction of current . R : Voltage drop or gain across a capacitor depends on the direction of current .

Can the potential difference across a battery be greater than its emf?

The terminal voltage across a cell is more than its emf if an another cell of:-

Assertion : Potential difference across the terminals of a battery is always less than the emf of the battery. Reason : During discharging of a battery potential differnce across to terminals of a battery is V = E -ir therefore V lt E

In the circuit here, the steady state voltage across capacitor C is a fraction of the battery EMF. The fraction is decided by:

In the circuit shown in fig the voltage across the 2Omega resistor is 12V. What is the emf of the battery and the current thorugh the 6Oemga resistor?

A reversible galvanic cell is connected to an external battery. If the EMF of the battery is less than EMF of the galvanic cell, current

In the simple L-R circuit, can the emf induced across the inductor ever be greater than the emf of the battery used to produce the current?