Physics-
General
Easy
Question
An alternating current of frequency 200 rad/sec and peak value 1A as shown in the figure, is applied to the primary of a transformer. If the coefficient of mutual induction between the primary and the secondary is 1.5 H, the voltage induced in the secondary will be
- 300 V
- 191 V
- 220 V
- 471 V
The correct answer is: 191 V
, 
Þ
Related Questions to study
physics-
The current through a 4.6 H inductor is shown in the following graph. The induced emf during the time interval t = 5 milli-sec to 6 milli-sec will be
The current through a 4.6 H inductor is shown in the following graph. The induced emf during the time interval t = 5 milli-sec to 6 milli-sec will be
physics-General
maths-
Statement (1): Two perpendicular tangents of parabola y2 = 16x always meet on x + 4 = 0.
Statement (2): Two perpendicular tangents of a parabola, always meets on axis.
Statement (1): Two perpendicular tangents of parabola y2 = 16x always meet on x + 4 = 0.
Statement (2): Two perpendicular tangents of a parabola, always meets on axis.
maths-General
maths-
Statement (1): The curve 9y2 –16x –12y –57 = 0 is symmetric about line 3y = 2.
Statement (2): A parabola is symmetric about it’s axis.
Statement (1): The curve 9y2 –16x –12y –57 = 0 is symmetric about line 3y = 2.
Statement (2): A parabola is symmetric about it’s axis.
maths-General
maths-
y2 = 4x is the equation of a parabola.
Assertion : Through (
+ 1), 3 normals can be drawn to the parabola, if 
< 2
Reason : The point ( + 1) lies outside the parabola for all 
–1.
y2 = 4x is the equation of a parabola.
Assertion : Through ( + 1), 3 normals can be drawn to the parabola, if < 2
Reason : The point ( + 1) lies outside the parabola for all –1.
maths-General
maths-
Assertion (A) : In given fig., Length of ST = 8
Reason (R) : The tangents at point P and Q on parabola meet in T, then ST2 = SP. SQ.
Assertion (A) : In given fig., Length of ST = 8
Reason (R) : The tangents at point P and Q on parabola meet in T, then ST2 = SP. SQ.
maths-General
physics-
The variation of induced emf (E) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as
The variation of induced emf (E) with time (t) in a coil if a short bar magnet is moved along its axis with a constant velocity is best represented as
physics-General
physics-
The graph Shows the variation in magnetic flux 
with time through a coil. Which of the statements given below is not correct
The graph Shows the variation in magnetic flux with time through a coil. Which of the statements given below is not correct
physics-General
physics-
A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle 
. The earth’s magnetic field component in the direction perpendicular to swing is B. Maximum potential difference induced across the pendulum is
A simple pendulum with bob of mass m and conducting wire of length L swings under gravity through an angle . The earth’s magnetic field component in the direction perpendicular to swing is B. Maximum potential difference induced across the pendulum is
physics-General
physics-
The network shown in the figure is a part of a complete circuit. If at a certain instant the current i is 5 A and is decreasing at the rate of 
then 
is
The network shown in the figure is a part of a complete circuit. If at a certain instant the current i is 5 A and is decreasing at the rate of then is
physics-General
physics-
The figure shows three circuits with identical batteries, inductors, and resistors. Rank the circuits according to the current through the battery (i) just after the switch is closed and (ii) a long time later, greatest first
The figure shows three circuits with identical batteries, inductors, and resistors. Rank the circuits according to the current through the battery (i) just after the switch is closed and (ii) a long time later, greatest first
physics-General
physics-
What is the mutual inductance of a two-loop system as shown with centre separation l
What is the mutual inductance of a two-loop system as shown with centre separation l
physics-General
Maths-
Assertion (A) : The length of latus rectum in fig is 24/5.
Reason (R) : If l 1 and l2are length of segments of a focal chord of a parabola, then its latus rectum is 
.
Assertion (A) : The length of latus rectum in fig is 24/5.
Reason (R) : If l 1 and l2are length of segments of a focal chord of a parabola, then its latus rectum is .
Maths-General
maths-
Assertion: Through ( + 1) there can not the more than one normal to the parabola y2 = 4x if + < 2.
Reason: The point ( + 1) lie out side the parabola for all 
1.
Assertion: Through ( + 1) there can not the more than one normal to the parabola y2 = 4x if + < 2.
Reason: The point ( + 1) lie out side the parabola for all 1.
maths-General
maths-
The point of intersection of the tangents at the ends of the latus rectum of the parabola y2 = 4x is .
The point of intersection of the tangents at the ends of the latus rectum of the parabola y2 = 4x is .
maths-General
maths-
If a ≠ 0 and the line 2bx + 3cy + 4d = 0 passes through the points of intersection of the parabolas 
= 4ax and 
= 4ay, then-
If a ≠ 0 and the line 2bx + 3cy + 4d = 0 passes through the points of intersection of the parabolas = 4ax and = 4ay, then-
maths-General
