Easy
657 likes
Question
Establish the relationship between internal resistance and EMF of an electric cell.
WBBSE
Class X
Physical Science
Current Electricity
02 Mark
2024
Answer
Current (I) = \text{EMF}\over \text{Total Resistance}
Current (I) = \text{E}\over \text{(R + r)}
∴ E = I (R + r)
Related Questions
More WBBSE Easy level questions
1/12
Easy
813
Q.
Write down the difference between dynamo and electric motor. What is earthing?
A.
Difference between Dynamo and Electric Motor: Feature Dynamo Electric Motor Function Converts...
View Question
Easy
730
Q.
By which rule is the direction of rotation of Barlow’s wheel determined?
A.
The direction of rotation of Barlow's wheel is determined by Fleming's Left-Hand...
View Question
Easy
959
Q.
What would be the equivalent resistance of a circuit containing resistances of 6 Ω and...
A.
First, calculate the equivalent resistance of the two resistors in parallel (6...
View Question
Easy
729
Q.
If two conductor wires of resistances 6 ohms and 4 ohms are connected in parallel...
A.
For parallel Combination: = + or, = + or, = or, Req...
View Question
Easy
846
Q.
Give the definition of electromotive force of an electric cell in open circuit.
A.
The electromotive force (emf) of an electric cell in an open circuit...
View Question
Moderate
881
Q.
What is the importance of insulators in household wiring?
A.
Importance of Insulators in Household Wiring: Safety: Prevents electric shock. Prevents Short...
View Question
Easy
1
Q.
If 5 ampere current is conducted for 30 seconds through any conductor then the total...
A.
(b) 150 coulomb Explanation The total charge (Q) is given by Q...
View Question
Easy
1
Q.
An electric current is flowing through a wire. If in this situation the wire is...
A.
(b) will decrease Explanation When the wire is stretched, its length increases...
View Question
Easy
Q.
State Fleming’s Left Hand Rule
A.
Fleming's left-hand rule states that when you stretch the thumb, forefinger, and...
View Question
Easy
996
Q.
What is DC?
A.
DC (Direct Current) is a type of electric current that flows in...
View Question
Easy
657
Q.
State Ohm’s law. If a potential difference of 10 V is applied between the two...
A.
Ohm's Law states that the current (I) flowing through a conductor is...
View Question
Easy
963
Q.
Which energy is transformed to which energy in an electric motor? Why in domestic circuits,...
A.
In an electric motor, electrical energy is transformed into mechanical energy. Domestic...
View Question