Physics-
General
Easy
Question
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
- 5 V
- 10 V
- 15 V
- 20 V
The correct answer is: 15 V
By using Kirchoff’s voltage law
Related Questions to study
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
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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
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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.
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maths-General
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The point of intersection of the tangents at the ends of the latus rectum of the parabola y2 = 4x is .
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maths-General
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If a ≠ 0 and the line 2bx + 3cy + 4d = 0 passes through the points of intersection of the parabolas 
= 4ax and 
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maths-General
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If M is the foot of perpendicular from a point P of a parabola y2 = 4ax to its directrix and SPM is an equilateral triangle, where S is the focus. Then SP equal to-
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A conducting rod AC of length 4l is rotated about a point O in a uniform magnetic field 
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physics-General
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A wire cd of length l and mass m is sliding without friction on conducting rails ax and by as shown. The vertical rails are connected to each other with a resistance R between a and b. A uniform magnetic field B is applied perpendicular to the plane abcd such that cd moves with a constant velocity of
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A rectangular loop with a sliding connector of length l = 1.0 m is situated in a uniform magnetic field B = 2T perpendicular to the plane of loop. Resistance of connector is r = 2
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physics-General
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The north and south poles of two identical magnets approach a coil, containing a condenser, with equal speeds from opposite sides. Then
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physics-General
physics-
A conducting ring is placed around the core of an electromagnet as shown in fig. When key K is pressed, the ring
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physics-General
physics-
Shown in the figure is a circular loop of radius r and resistance R. A variable magnetic field of induction 
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physics-General
