The e.m.f. of a cell is _____ the voltage across its terminals when no current flows. Fill in the blank.
more than
less than
none of these
equal to
A
more than
B
less than
C
none of these
D
equal to
Open in App
Solution
Verified by Toppr
Voltage across the cell terminals V=E−Ir
∴I=0⟹V=E
Thus e.m.f of a cell is equal to the voltage across its terminal when no current flows.
Was this answer helpful?
0
Similar Questions
Q1
The e.m.f. of a cell is _____ the voltage across its terminals when no current flows. Fill in the blank.
View Solution
Q2
A cell is used to send current to an external circuit.
(a) How does the voltage across its terminals compare with its e.m.f.?
(b) Under what condition is the e.m.f. of the cell equal to its terminal voltage?
View Solution
Q3
When a voltmeter is connected across the terminals of a cell, it measure 9 Volt. If a resistance of 1.5Ω is connected across the terminals of a cell as shown in figure. Then current flowing through this resistance is :-
View Solution
Q4
A cell is used to send current to an external circuit. How does the voltage across its terminals compare with its e.m.f.?
View Solution
Q5
When a resistance of 2ohm is connected across the terminals of a cell, the current is 0.5amp. When the resistance is increased to 5ohm, the current is 0.25amp. The emf of the cell is: