Video Lecture
Theory For Making Notes
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Practice Questions (Basic Level)
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Practice Questions (JEE Main Level)
Q.1
Calculate net resistance between A and B :
(a) \displaystyle \frac{{4r}}{5}
(b) \displaystyle \frac{{3r}}{5}
(c) \displaystyle \frac{{4r}}{3}
(d) None
Ans. (a)
Q.2
Calculate net resistance between A and B :
(a) 1 \displaystyle \Omega
(b) 2 \displaystyle \Omega
(c) 3 \displaystyle \Omega
(d) None
Ans. (c)
Q.3
Calculate net resistance between A and B :
(a) \displaystyle \frac{{7r}}{3}
(b) \displaystyle \frac{{5r}}{6}
(c) \displaystyle \frac{{7r}}{2}
(d) \displaystyle \frac{{7r}}{6}
Ans. (d)
Q.4
A five-point regular star has been formed from a uniform wire. Calculate the equivalent resistance between points P and Q. Take sin =1/3 resistance of sections \displaystyle PQ\,=\,QR\,=\,RS\,=\,ST\,=\,TU\,=\,UV\,=\,VW\,=\,WX\,=\,XY\,=\,r
(a) r
(b) 2r/3
(c) 3r/5
(d) 2r
Ans. (c)
Q.5
Twelve wires of equal resistance R are connected to form a cube. The effective resistance between the diagonal ends of the figure will be :
(a) (5/6)R
(b) (6/5) R
(c) 3R
(d) 12R
Ans. (a)
Q.6
Net resistance between A and B in the given network is :
(a) \displaystyle \frac{{5R}}{7}
(b) \displaystyle \frac{{7R}}{6}
(c) \displaystyle \frac{{4R}}{5}
(d) \displaystyle \frac{{5R}}{4}
Ans. (d)
Q.7
Net resistance between A and B in the given network is :
(a) \displaystyle \frac{{5R}}{7}
(b) \displaystyle \frac{{7R}}{6}
(c) \displaystyle \frac{{3R}}{2}
(d) \displaystyle \frac{{5R}}{4}
Ans. (c)
Q.8
The current I drawn from the 5 volt source will be :
(a) 0.17 A
(b) 0.33 A
(c) 0.5 A
(d) 0.67 A
Ans.. (c)
Q.9
The given figure shows an infinite ladder network of resistances. The equivalent resistance between points A and B is :
(a) Infinite
(b) 3.73 \displaystyle \Omega
(c) 2.73 \displaystyle \Omega
(d) 2/3 \displaystyle \Omega
Ans. (c)
Q.10
Find RAB, each individual resistance being R.
(a) 4R/5
(b) 7R/4
(c) 3R/2
(d) 5R/2
Ans. (a)
Q.11
Find RAB, each individual resistance being R.
(a) R/5
(b) R/4
(c) R/2
(d) 5R/2
Ans. (b)
Practice Questions (JEE Advance Level)
Q.1
Find the net resistance in each of the following symmetrical circuits
(Each edge of the cubes given in (b), (c),(d) and (e) has a resistance `r’ )
Q.2
A finite square grid each link having resistance r is fitted in a resistanceless conducting circular wire. Determine equivalent resistance between A and B.
Ans : (21r)/40
Q.3
In the diagram shown, all the wires have resistance R. The equivalent resistance between the upper and lower dots shown in the diagram is
(a) R/8
(b) R
(c) 2R/5
(d) 3R/8
Ans. (d)
Q.4
In the infinite square grid resistance of each link is r. Determine the equivalent resistance between two junctions A and B. The link between A and B is missing.
Ans. x = r