Current Electricity– 2 Practice Questions - DPP for NEET

 Page 1


DIRECTIONS (Q.1-Q.18) : There are 18 multiple choice
questions. Each question has 4 choices (a), (b), (c) and (d), out
of which ONLY ONE choice is correct.
Q.1 The voltmeter shown in fig, reads 6V across the 60 W
resistor. Then the resistance of the voltmeter is-
(a) 0 W
(b) ¥ W
(c) 200 W
(d) 300 W
Q.2 If only one hundredth part of total current flowing in the
circuit is to be passed through a galvanometer of resistance
GW, Then the value of shunt resistance required will be-
(a) G/10 (b) G/100 (c) G/99 (d) G/999
Q.3 The shunt required for 10% of main current to be sent
through the moving coil galvanometer of resistance 99W
will be-
(a) 0.9 W (b) 11 W (c) 90 W (d) 9.9 W
Q.4 The reading of voltmeter in the following circuit will be-
20 W
2V
– +
80 W
80 W
®
V
(a) 2 volt (b) 0.80 volt (c) 1.33 volt (d) 1.60 volt
Page 2


DIRECTIONS (Q.1-Q.18) : There are 18 multiple choice
questions. Each question has 4 choices (a), (b), (c) and (d), out
of which ONLY ONE choice is correct.
Q.1 The voltmeter shown in fig, reads 6V across the 60 W
resistor. Then the resistance of the voltmeter is-
(a) 0 W
(b) ¥ W
(c) 200 W
(d) 300 W
Q.2 If only one hundredth part of total current flowing in the
circuit is to be passed through a galvanometer of resistance
GW, Then the value of shunt resistance required will be-
(a) G/10 (b) G/100 (c) G/99 (d) G/999
Q.3 The shunt required for 10% of main current to be sent
through the moving coil galvanometer of resistance 99W
will be-
(a) 0.9 W (b) 11 W (c) 90 W (d) 9.9 W
Q.4 The reading of voltmeter in the following circuit will be-
20 W
2V
– +
80 W
80 W
®
V
(a) 2 volt (b) 0.80 volt (c) 1.33 volt (d) 1.60 volt
2
DPP/ P 37
Q.5 The figure below shows currents in a part of electric circuit.
The current i is
(a) 1.7 amp
2 amp
2 amp
1 amp
1.3 amp
i
(b) 3.7 amp
(c) 1.3 amp
(d) 1 amp
Q.6 A voltmeter can measure upto 25 volt and its resistance is
1000 W. The resistance required to add with voltmeter to
measure upto 250 volt will be-
(a) 9000 W (b) 1000 W (c) 2500 W (d) 900 W
Q.7 When a Laclanche cell is connected to a 10W resistance
then a current of 0.25 ampere flows in the circuit. If the
resistance is reduced to 4W then current becomes
0.5ampere. The internal resistance of galvanometer will be-
(a) 1.5 W (b) 0.5 W (c) 1 W (d) 2 W
Q.8 Consider the circuit shown in the figure. The value of
current I
3
 is
(a) 5 A
28 W 54 W
6 V
I
3
8 V
12 V
B
(b) 3 A
(c) – 3 A
(d) – 5/6 A
Q.9 If V
B 
– V
A
 = 4 V in the given figure, then resistance X will
be
(a) 5 W
10 W 5 V
2 V X
A
B
(b) 10 W
(c) 15 W
(d) 20 W
Q.10 In the given circuit the current I
1
 is
(a) 0.4 A
I
1
30 W
40 W
40 W
40 V
80 V
I
3
I
2
(b) – 0.4 A
(c) 0.8 A
(d) – 0.8 A
Q.11 To get the maximum current from a parallel combination
of n identical cells each of internal resistance r in an
external resistance R,
(a) R >> r (b) R << r (c) R > r (d) R = r
Q.12 In the circuit shown below, if the value of R is increased
then what will be the effect on the reading of ammeter if
the internal resistance of cell is negligible-
(a) The reading of  ammeter will decrease
(b) The reading of ammeter will increase
(c) The reading of ammeter will remain unchanged
(d) The reading of ammeter will become zero.
Q.13 Twelve wires of equal length and same cross-section are
connected in the form of a cube. If the resistance of each
of the wires is R, then the effective resistance between
the two diagonal ends would be
(a) 2 R
(b) 12 R
(c)
5
R
6
(d) 8 R
Q.14 The arrangement as shown in figure is called as
(a) Potential divider
(b) Potential adder
(  )
Total P.D.
V ariable P .D.
(c) Potential substracter
(d) Potential multiplier
Q.15 When a cell of emf E and internal resistance r, is connected
to the ends of a resistance R, then current through
resistance is I. If the same cell is connected to the ends of
a resistance R/2 then the current would be-
(a) less than I
(b)I
(c) greater then I but less than 2I
(d) greater than 2I
Page 3


DIRECTIONS (Q.1-Q.18) : There are 18 multiple choice
questions. Each question has 4 choices (a), (b), (c) and (d), out
of which ONLY ONE choice is correct.
Q.1 The voltmeter shown in fig, reads 6V across the 60 W
resistor. Then the resistance of the voltmeter is-
(a) 0 W
(b) ¥ W
(c) 200 W
(d) 300 W
Q.2 If only one hundredth part of total current flowing in the
circuit is to be passed through a galvanometer of resistance
GW, Then the value of shunt resistance required will be-
(a) G/10 (b) G/100 (c) G/99 (d) G/999
Q.3 The shunt required for 10% of main current to be sent
through the moving coil galvanometer of resistance 99W
will be-
(a) 0.9 W (b) 11 W (c) 90 W (d) 9.9 W
Q.4 The reading of voltmeter in the following circuit will be-
20 W
2V
– +
80 W
80 W
®
V
(a) 2 volt (b) 0.80 volt (c) 1.33 volt (d) 1.60 volt
2
DPP/ P 37
Q.5 The figure below shows currents in a part of electric circuit.
The current i is
(a) 1.7 amp
2 amp
2 amp
1 amp
1.3 amp
i
(b) 3.7 amp
(c) 1.3 amp
(d) 1 amp
Q.6 A voltmeter can measure upto 25 volt and its resistance is
1000 W. The resistance required to add with voltmeter to
measure upto 250 volt will be-
(a) 9000 W (b) 1000 W (c) 2500 W (d) 900 W
Q.7 When a Laclanche cell is connected to a 10W resistance
then a current of 0.25 ampere flows in the circuit. If the
resistance is reduced to 4W then current becomes
0.5ampere. The internal resistance of galvanometer will be-
(a) 1.5 W (b) 0.5 W (c) 1 W (d) 2 W
Q.8 Consider the circuit shown in the figure. The value of
current I
3
 is
(a) 5 A
28 W 54 W
6 V
I
3
8 V
12 V
B
(b) 3 A
(c) – 3 A
(d) – 5/6 A
Q.9 If V
B 
– V
A
 = 4 V in the given figure, then resistance X will
be
(a) 5 W
10 W 5 V
2 V X
A
B
(b) 10 W
(c) 15 W
(d) 20 W
Q.10 In the given circuit the current I
1
 is
(a) 0.4 A
I
1
30 W
40 W
40 W
40 V
80 V
I
3
I
2
(b) – 0.4 A
(c) 0.8 A
(d) – 0.8 A
Q.11 To get the maximum current from a parallel combination
of n identical cells each of internal resistance r in an
external resistance R,
(a) R >> r (b) R << r (c) R > r (d) R = r
Q.12 In the circuit shown below, if the value of R is increased
then what will be the effect on the reading of ammeter if
the internal resistance of cell is negligible-
(a) The reading of  ammeter will decrease
(b) The reading of ammeter will increase
(c) The reading of ammeter will remain unchanged
(d) The reading of ammeter will become zero.
Q.13 Twelve wires of equal length and same cross-section are
connected in the form of a cube. If the resistance of each
of the wires is R, then the effective resistance between
the two diagonal ends would be
(a) 2 R
(b) 12 R
(c)
5
R
6
(d) 8 R
Q.14 The arrangement as shown in figure is called as
(a) Potential divider
(b) Potential adder
(  )
Total P.D.
V ariable P .D.
(c) Potential substracter
(d) Potential multiplier
Q.15 When a cell of emf E and internal resistance r, is connected
to the ends of a resistance R, then current through
resistance is I. If the same cell is connected to the ends of
a resistance R/2 then the current would be-
(a) less than I
(b)I
(c) greater then I but less than 2I
(d) greater than 2I
DPP/ P 37
3
Q.16 The resistance of an ideal voltmeter is
(a) Zero (b) Very low
(c) Very large (d) Infinite
Q.17An ammeter with internal resistance 90 W reads 1.85 A
when connected in a circuit containing a battery and two
resistors 700 W and 410 W in series. Actual current will
be
(a) 1.85 A (b) Greater than 1.85 A
(c) Less than 1.85 A (d) None of these
Q.18 The figure shows a network of currents. The magnitude of
currents is shown here. The current I will be
I
2 A
6 A
10 A
1 A
(a) 3 A (b) 9 A
(c) 13 A (d) 19 A
DIRECTIONS (Q.19-Q.21) : In the following questions,
more than one of the answers  given are correct. Select the
correct answers and mark it according to the following
codes:
Codes :
(a) 1, 2 and 3 are correct (b) 1 and 2 are correct
(c) 2 and 4 are correct (d) 1 and 3 are correct
Q.19 In the figure,
X E r Y
15 V 6 V
(1) current may flow from X to Y
(2) current may flow from Y to X
(3) current’s direction depends on E
(4) current’s direction depends on r
Q.20Kirchoff’s laws are based on conservation of
(1) charge (2) potential
(3) energy (4) mass
Q.21 A microammeter has a resistance of 100W and a full scale
range of 50 µA. It can be used as a voltmeter or a higher
range ammeter provided a resistance is added to it. Pick
the correct range and resistance combination(s).
(1) 10V range with 200 kW resistance in series.
(2) 50V range with 10 kW resistance in series.
(3) 5 mA range with 1W resistance in parallel.
(4) 10 mA range with 1 kW resistance in parallel.
DIRECTIONS (Q.22-Q.23) : Read the passage given below
and answer the questions that follows :
A 6V battery of negligible internal resistance is connected across
a uniform wire AB of length 100cm. The positive terminal of
another battery of emf 4V and internal resistance 1W is joined
to the point A as shown in figure. Take the potential at B to be
zero.
A
D
B
C
1
4V
6V
Q.22 What are the potentials at points A and C ?
(a) 6V , 2V (b) 8V , 4V
(c) 6V , 4V (d) 8V , 3V
Q.23 If the points C and D are connected by a wire, what will be
the current through it ?
(a) zero (b) 1A
(c) 2A (d) 3A
DIRECTIONS (Qs. 24-Q.26) : Each of these questions contains
two statements: Statement-1 (Assertion) and Statement-2
(Reason). Each of these questions has four alternative choices,
only one of which is the correct answer. You have to select the
correct choice.
(a) Statement-1 is True, Statement-2 is True; Statement-2 is a
correct explanation for  Statement-1.
(b) Statement-1 is True, Statement-2 is True; Statement-2 is
NOT a correct explanation for Statement-1.
(c) Statement -1 is False, Statement-2 is True.
(d) Statement -1 is True, Statement-2 is False.
Page 4


DIRECTIONS (Q.1-Q.18) : There are 18 multiple choice
questions. Each question has 4 choices (a), (b), (c) and (d), out
of which ONLY ONE choice is correct.
Q.1 The voltmeter shown in fig, reads 6V across the 60 W
resistor. Then the resistance of the voltmeter is-
(a) 0 W
(b) ¥ W
(c) 200 W
(d) 300 W
Q.2 If only one hundredth part of total current flowing in the
circuit is to be passed through a galvanometer of resistance
GW, Then the value of shunt resistance required will be-
(a) G/10 (b) G/100 (c) G/99 (d) G/999
Q.3 The shunt required for 10% of main current to be sent
through the moving coil galvanometer of resistance 99W
will be-
(a) 0.9 W (b) 11 W (c) 90 W (d) 9.9 W
Q.4 The reading of voltmeter in the following circuit will be-
20 W
2V
– +
80 W
80 W
®
V
(a) 2 volt (b) 0.80 volt (c) 1.33 volt (d) 1.60 volt
2
DPP/ P 37
Q.5 The figure below shows currents in a part of electric circuit.
The current i is
(a) 1.7 amp
2 amp
2 amp
1 amp
1.3 amp
i
(b) 3.7 amp
(c) 1.3 amp
(d) 1 amp
Q.6 A voltmeter can measure upto 25 volt and its resistance is
1000 W. The resistance required to add with voltmeter to
measure upto 250 volt will be-
(a) 9000 W (b) 1000 W (c) 2500 W (d) 900 W
Q.7 When a Laclanche cell is connected to a 10W resistance
then a current of 0.25 ampere flows in the circuit. If the
resistance is reduced to 4W then current becomes
0.5ampere. The internal resistance of galvanometer will be-
(a) 1.5 W (b) 0.5 W (c) 1 W (d) 2 W
Q.8 Consider the circuit shown in the figure. The value of
current I
3
 is
(a) 5 A
28 W 54 W
6 V
I
3
8 V
12 V
B
(b) 3 A
(c) – 3 A
(d) – 5/6 A
Q.9 If V
B 
– V
A
 = 4 V in the given figure, then resistance X will
be
(a) 5 W
10 W 5 V
2 V X
A
B
(b) 10 W
(c) 15 W
(d) 20 W
Q.10 In the given circuit the current I
1
 is
(a) 0.4 A
I
1
30 W
40 W
40 W
40 V
80 V
I
3
I
2
(b) – 0.4 A
(c) 0.8 A
(d) – 0.8 A
Q.11 To get the maximum current from a parallel combination
of n identical cells each of internal resistance r in an
external resistance R,
(a) R >> r (b) R << r (c) R > r (d) R = r
Q.12 In the circuit shown below, if the value of R is increased
then what will be the effect on the reading of ammeter if
the internal resistance of cell is negligible-
(a) The reading of  ammeter will decrease
(b) The reading of ammeter will increase
(c) The reading of ammeter will remain unchanged
(d) The reading of ammeter will become zero.
Q.13 Twelve wires of equal length and same cross-section are
connected in the form of a cube. If the resistance of each
of the wires is R, then the effective resistance between
the two diagonal ends would be
(a) 2 R
(b) 12 R
(c)
5
R
6
(d) 8 R
Q.14 The arrangement as shown in figure is called as
(a) Potential divider
(b) Potential adder
(  )
Total P.D.
V ariable P .D.
(c) Potential substracter
(d) Potential multiplier
Q.15 When a cell of emf E and internal resistance r, is connected
to the ends of a resistance R, then current through
resistance is I. If the same cell is connected to the ends of
a resistance R/2 then the current would be-
(a) less than I
(b)I
(c) greater then I but less than 2I
(d) greater than 2I
DPP/ P 37
3
Q.16 The resistance of an ideal voltmeter is
(a) Zero (b) Very low
(c) Very large (d) Infinite
Q.17An ammeter with internal resistance 90 W reads 1.85 A
when connected in a circuit containing a battery and two
resistors 700 W and 410 W in series. Actual current will
be
(a) 1.85 A (b) Greater than 1.85 A
(c) Less than 1.85 A (d) None of these
Q.18 The figure shows a network of currents. The magnitude of
currents is shown here. The current I will be
I
2 A
6 A
10 A
1 A
(a) 3 A (b) 9 A
(c) 13 A (d) 19 A
DIRECTIONS (Q.19-Q.21) : In the following questions,
more than one of the answers  given are correct. Select the
correct answers and mark it according to the following
codes:
Codes :
(a) 1, 2 and 3 are correct (b) 1 and 2 are correct
(c) 2 and 4 are correct (d) 1 and 3 are correct
Q.19 In the figure,
X E r Y
15 V 6 V
(1) current may flow from X to Y
(2) current may flow from Y to X
(3) current’s direction depends on E
(4) current’s direction depends on r
Q.20Kirchoff’s laws are based on conservation of
(1) charge (2) potential
(3) energy (4) mass
Q.21 A microammeter has a resistance of 100W and a full scale
range of 50 µA. It can be used as a voltmeter or a higher
range ammeter provided a resistance is added to it. Pick
the correct range and resistance combination(s).
(1) 10V range with 200 kW resistance in series.
(2) 50V range with 10 kW resistance in series.
(3) 5 mA range with 1W resistance in parallel.
(4) 10 mA range with 1 kW resistance in parallel.
DIRECTIONS (Q.22-Q.23) : Read the passage given below
and answer the questions that follows :
A 6V battery of negligible internal resistance is connected across
a uniform wire AB of length 100cm. The positive terminal of
another battery of emf 4V and internal resistance 1W is joined
to the point A as shown in figure. Take the potential at B to be
zero.
A
D
B
C
1
4V
6V
Q.22 What are the potentials at points A and C ?
(a) 6V , 2V (b) 8V , 4V
(c) 6V , 4V (d) 8V , 3V
Q.23 If the points C and D are connected by a wire, what will be
the current through it ?
(a) zero (b) 1A
(c) 2A (d) 3A
DIRECTIONS (Qs. 24-Q.26) : Each of these questions contains
two statements: Statement-1 (Assertion) and Statement-2
(Reason). Each of these questions has four alternative choices,
only one of which is the correct answer. You have to select the
correct choice.
(a) Statement-1 is True, Statement-2 is True; Statement-2 is a
correct explanation for  Statement-1.
(b) Statement-1 is True, Statement-2 is True; Statement-2 is
NOT a correct explanation for Statement-1.
(c) Statement -1 is False, Statement-2 is True.
(d) Statement -1 is True, Statement-2 is False.
4
DPP/ P 37
Q.24Statement -1 : Voltameter measures current more
accurately than ammeter.
Statement -2 : Relative error will be small if measured
from voltameter.
Q.25 Statement - 1 : A larger dry cell has higher emf.
Statement - 2 : The emf of a dry cell is independent of its size.
Q.26 Statement - 1 : In the circuit shown, V
ab
 or V
a
 – V
b
 = 0,
if
I = 2A.
4V
2
a
b
Statement - 2 : Potential difference across the
terminals of a non ideal battery is less than its emf when a
current flows through it.