A straight conductor of uniform cross-
section carried a current I. Let
s=specific charge of an electron. The momentum of all the free electrons per
unit length of the conductor, due to their drift velocities only, is
Q2PhysicsUnit 12: Current Electricity
In the circuit shown, the heat produced in 5Ω resistor is 10 calorie/sec. The heat
produced/sec in 4Ω resistor will be :
Q3PhysicsUnit 12: Current Electricity
In a metallic conductor, electric current
is thought to be due to the movement of
Q4PhysicsUnit 12: Current Electricity
The equivalent Resistance:
This question has multiple correct options
Q5PhysicsUnit 12: Current Electricity
Between any two points in a circuit, the sum of all ……....... is the same through
any pathway.
Q6PhysicsUnit 12: Current Electricity
Q Type your question-
and of fixed emf, the resistor R1 has
fixed resistance and the resistance of
resistor R2 can be varied (but R2 is
always nonzero). Then the electric power
delivered to the resistor of resistance
R1 is independent of the value of
resistance R2
Reason
f potential difference across a fixed
resistance is unchanged, the power delivered to the resistor remains
constant.
Q7PhysicsUnit 12: Current Electricity
Fuse wire should be placed in the path
of wire
Q8PhysicsUnit 12: Current Electricity
There are a large number of cells available, each marked (6V,0.5Ω) to be used to supply current to a device of resistance 0.75Ω, requiring 24A current. How should the cells be
arranged, so that power is transmitted to the load using minimum number of
cells?
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