FIITJEE KVPY (QUESTION BANK) PHYSICS 1 (MODULE - 3)

PHYSICS
ELECTRIC CIRCUITS
LEVEL 1 OBJECTIVE PROBLEMS
1. EMF represents a
(a) potential energy (b) a force
(c) work done per unit charge (d) potential difference

2. There are n exactly identical resistors each having resistance R. The resultant resistance
when joined in parallel is , then on connecting them is series the resistance will come
out be

(a) 2 (b) n2
n

(c) 3 (d) n3
n

3. Find the equivalent resistance between P and Q

P 4 1 2

4
2 4 4
10 V 2

Q
(a) 10 (b) 5
(c) 15 (d) 20
2V, 1
4. Find the potential difference between A and
B.
(a) 6 V (b) 2 V
(c) 3 V (d) 1 V A B

4V, 1

5. Six equal resistances, each 4, make

the arms of the given figure. The
effective resistance between any two
corners is
2
(a) 10 (b) 
3

(c) 4 (d) 2

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FIITJEE KVPY (QUESTION BANK) PHYSICS 2 (MODULE - 3)

6. In the given circuit, the current through (10 V, 3)

the resistor is
(a) 1.5 A (b) 3.0 A
(12 V, 2)
(c) 3.5 A (d) 7.0 A

2

7. The effective resistance of the network R R R

between points A and B R
(a) 4R
A B
(b) 2R R R R
(c) 10R
(d) 5R/2

8. What is the effective resistance between

A and B R
R
2R R
(a) (b)
3 3
6R 8 R R
(c) (d)
3 3 R R

A B

5
P
9. The effective resistance between the
terminals P and Q in following circuit
(a) 5  (b) 10  10 
10  5
(c) 25  (d) 30 
5
Q

10. The resistance of a wire is R. It is stretched uniformly so that its length is doubled. The
resistance now becomes
(a) 2R (b) R/2
(c) 4R (d) R/4

FIITJEE BANGALORE CENTRE, #19, 13TH CROSS, 6TH SECTOR, HSR LAYOUT, BENGALURU-560102
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FIITJEE KVPY (QUESTION BANK) PHYSICS 3 (MODULE - 3)

11. In the given circuit, each resistance is A C

10-. The equivalent resistance between
A and D is
(a) 40 
(b) 30 
B D
(c) 20 
(d) 10 

12. In the network shown, which of the following is incorrect?

B
(a) VAB = 2 V
2 3
(b) VDA = –3 V 2A
A C
(c) VBD = 1 V
3 2
(d) VCD = 2 V D

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FIITJEE KVPY (QUESTION BANK) PHYSICS 4 (MODULE - 3)

LEVEL 2

1. An infinite ladder network is constructed 1  1  1 

A
with 1 and 2 resistors as shown. The
effective resistance between A and B is
(a) 1 6 V 2  2  2 
(b) 2 

(c) 3 B
(d) 4

2. In the given circuit find the potential difference between X and Y

(a) 6.7 V (b) 3.7 V
(c) 4 V (d) 10 V
A 4 V
X
2

3 3 5

2 V 4 V

B Y

3. For what value of R is the current in 5 

galvanometer zero
(a) 5 (b) 2
(c) 7 (d) 1 G
R
12 V
+
2 V 

4. If S is closed in the following circuit then A1

(a) reading in A1 increases and A2 decreases
(b) reading in A1 increases and A2 also increases
(c) reading in A1 is unaffected and A2 decreases R1 R2
(d) reading in A1 increases and A2 unaffected V
A2 S

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FIITJEE KVPY (QUESTION BANK) PHYSICS 5 (MODULE - 3)

2  2  B
5. Find the current in AB branch
(a) 1.5 A 3  2 
(b) 2 A
(c) 1.33 A 3 V
A
(d) infinite

6. Equivalent resistance between point x and

y will be (resistance of each branch is 15
)
(a) 8  (b) 7 

(c) 15  (d) none

x y

7. In a circular wire of resistance per unit length  as shown, the

equivalent resistance is calculated between two points A and
B.  for which Req to be maximum is
(a) /2 (b) /4 
A B
(c)  (d) 3/4

8. In the circuit shown in figure, the voltmeter reading will be

3V
(a) zero A V
(b) 0.5 V
(c) 1 V 1  2 
(d) 2 V

9. In the circuit given, which of the following is incorrect?

10 A 7 5 B
(a) current I1 is  A
7
10 I1 4V I2
(b) current I1 is A
7
12
(c) current I2 is A 6V 8V
5
(d) VAB = 2 V

10. For what ratio of R1, R2 and R3, power developed R2
across each resistor is equal?
(a) 1 : 1 : 1 (b) 4 : 4 : 1 i R1 i
R3
(c) 4 : 1 : 1 (d) 1 : 4 : 4

FIITJEE BANGALORE CENTRE, #19, 13TH CROSS, 6TH SECTOR, HSR LAYOUT, BENGALURU-560102
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FIITJEE KVPY (QUESTION BANK) PHYSICS 6 (MODULE - 3)

120 V

11. In the given circuit, the pd across R2 is 40 V and the

ammeter reads 2 A. A R1 25 
The value of R1 is
(a) 20  R2
(b) 40  20 
(c) 60 
(d) 80 

FIITJEE BANGALORE CENTRE, #19, 13TH CROSS, 6TH SECTOR, HSR LAYOUT, BENGALURU-560102
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FIITJEE KVPY (QUESTION BANK) PHYSICS 7 (MODULE - 3)

ANSWER KEY: LEVEL: 1

1. C 2. B 3. B 4. C 5. D
6. C 7. D 8. D 9. A 10. C
11. B 12. D

ANSWER KEY: LEVEL: 2

1. B 2. B 3. D 4. D 5. A
6. A 7. C 8. A 9. B 10. B
11. C

FIITJEE BANGALORE CENTRE, #19, 13TH CROSS, 6TH SECTOR, HSR LAYOUT, BENGALURU-560102
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