A Current Electricity JEE mock test on Goodmarks lets you attempt 130+ timed MCQs with instant feedback. Use it to benchmark speed, accuracy, and readiness for JEE Main Physics.
Simulate exam conditions with a Current Electricity mock test. Attempt 130+ timed MCQs, check your score instantly, and review every solution to close gaps before the real exam.
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?
Q9PhysicsUnit 12: Current Electricity
The most important safety method used for protecting home appliances from short circuiting or overloading is
Q10PhysicsUnit 12: Current Electricity
A current of I ampere flows through a resistance R when connected across a
cell of emf E and internal resistance 1Ω
When R is increased by 50%, the
current through the circuit is 0.8A. The
value of R is :
Q11PhysicsUnit 12: Current Electricity
For a common emitter amplifier,
current gain is 60. If the emitter current
is 6.6mA the collector current is :
Q12PhysicsUnit 12: Current Electricity
In potentiometer experiment, null point
is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell, the balancing length will (Driving source is not changed)
Q13PhysicsUnit 12: Current Electricity
The electrical energy in kilowatt hours consumed in operating ten 50W
bulbs for 10 hrs/day in a month of
30 days is
Q14PhysicsUnit 12: Current Electricity
The Joules heating effect for an electric heater in A.C and in D.C. circuit is
Q15PhysicsUnit 12: Current Electricity
If the switch at point P is opened
(shown in the figure) choose the correct
option
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