HARD
10th CBSE
IMPORTANT
Earn 100

Define electric current and state its unit. How can Ohm's law be used to define ohm?

Important Questions on Electricity

HARD
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 4
Deduce the expression for the equivalent resistance of the parallel combination of two resistances R1 and R2.
HARD
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 5
Deduce the expression for the equivalent resistance of the two resistances R1, and R2; connected in series.
HARD
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 6
Derive an expression for the heat produced in time t in a wire of resistance R, which is carrying a current I.
HARD
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 1
When a particle of charge 10 μ C is brought from infinity to a point P, 2.0 m J of work is done by the external forces. What is the potential at P?
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 2
Calculate the work done in taking a charge of 0.02 C from A to B if the potential at A is 20 V, and that at B is 30 V.
MEDIUM
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 3
How much charge flows through a wire in 10 minutes if the current through it is 25 A?
HARD
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 4
A 2-V cell is connected to a 1-Ω resistor. How many electrons come out of the negative terminal of the cell in 2 minutes?
EASY
10th CBSE
IMPORTANT
Foundation Science Physics for Class 10>Chapter 4 - Electricity>EXERCISES>Q 5
The amount of charge passing through a cell in 4 seconds is 12 C. What is the current supplied by the cell?