Physics-
General
Easy
Question
In a choke coil, the resistance 
and resistance 
are such that
The correct answer is:
A choke coil is an electrical appliance used for controlling current in an a.c. circuit. In a choke coil 
to avoid power dissipation
Related Questions to study
Physics-
long solenoid having 
resistance and 
inductance is joined to a 
battery. At steady state the current through the solenoid in 
will be
long solenoid having resistance and inductance is joined to a battery. At steady state the current through the solenoid in will be
Physics-General
Physics-
The magnetic field in a coil of 100 turns and 
area is increased from 
to 
in 
. The magnetic field is perpendicular to the coil. The e.m.f. generated in it is
The magnetic field in a coil of 100 turns and area is increased from to in . The magnetic field is perpendicular to the coil. The e.m.f. generated in it is
Physics-General
Physics-
Energy required to establish a current of 4 A in a coil of self-inductance L =200mH is
Energy required to establish a current of 4 A in a coil of self-inductance L =200mH is
Physics-General
Physics-
A rectangular coil of 20 turns and area of cross-section 
has resistance of 
. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of 
per second, the current in the coil is
A rectangular coil of 20 turns and area of cross-section has resistance of . If a magnetic field which is perpendicular to the plane of the coil changes at the rate of per second, the current in the coil is
Physics-General
Physics-
The self induced emf in a coils of 0.4 henry self inductance when current in it is changing at the rate of 50As-1, is
The self induced emf in a coils of 0.4 henry self inductance when current in it is changing at the rate of 50As-1, is
Physics-General
Physics-
A square loop of side enters a magnetic field with 
. The front edge enters the magnetic field at 
then which graph best depicts 
A square loop of side enters a magnetic field with . The front edge enters the magnetic field at then which graph best depicts
Physics-General
Physics-General
Physics-
Average energy stored in a pure inductance 
when a current 
flows through it, is
Average energy stored in a pure inductance when a current flows through it, is
Physics-General
Physics-
If the switch in the following circuit is turned off, then
If the switch in the following circuit is turned off, then
Physics-General
Physics-General
Physics-
The time dependence of a physical quantity P is found to be of the form P =
where t is time and is some constant. Then the constant will -
The time dependence of a physical quantity P is found to be of the form P =where t is time and is some constant. Then the constant will -
Physics-General
Physics-
A dimensionless quantity -
A dimensionless quantity -
Physics-General
Physics-
If x = at + bt2, where x is in metres and t in hours (hr), then unit of b will be -
If x = at + bt2, where x is in metres and t in hours (hr), then unit of b will be -
Physics-General
Physics-
sin2
+ sin2
+ sin2
– sin2
is equal to
sin2+ sin2 + sin2 – sin2is equal to
Physics-General
Physics-
If A + B =
, then (tan A + 1) (tan B + 1) is equal to
If A + B = , then (tan A + 1) (tan B + 1) is equal to
Physics-General
Physics-
After rounding off the number 4621 to 2 signification digits the value becomes -
After rounding off the number 4621 to 2 signification digits the value becomes -
Physics-General
Physics-
The significant digits in 200.4 are -
The significant digits in 200.4 are -
Physics-General
