Equivalent resistance between the points A and B is (in Ω)
15
114
213
312
In the circuit shown here, what is the value of the unknown resistor R so that the total resistance of the circuit between points P and Q is also equal to R
3 ohms
39 ohms
69 ohms
10 ohms
The resistors of resistances 2 Ω, 4 Ω and 8 Ω are connected in parallel, then the equivalent resistance of the combination will be :
87Ω
78Ω
74Ω
49Ω
In the circuit, the potential difference across PQ will be nearest to
9.6 V
6.6 V
4.8 V
3.2 V
Three resistors are connected to form the sides of a triangle ABC, the resistance of the sides AB, BC and CA are 40 ohms, 60 ohms and 100 ohms respectively. The effective resistance between the points A and B in ohms will be
32
64
50
200
Find the equivalent resistance across AB.
1 Ω
2 Ω
3 Ω
4 Ω
Two wires of the same dimensions but resistivities ρ1 and ρ2 are connected in series. The equivalent resistivity of the combination is
ρ1 + ρ2
ρ1+ρ22
ρ1ρ2
2(ρ1+ρ2)
A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I, in the circuit will be
1/3 A
1 A
1.5 A
2 A
Find the equivalent resistance between the points a and b
8 Ω
16 Ω
The potential difference between point A & B is
207 V
407 V
107 V
0
In the circuit shown below, The reading of the voltmeter V is
12 V
8 V
20 V
16 V
In the circuit shown in the figure, the current flowing in 2 Ω resistance
(1) 4 A
(2) 1.2 A
(3) 0.4 A
(4) 1.0 A
In the figure given the value of X resistance will be, when the p.d. between B and D is zero
4 ohm
6 ohm
8 ohm
9 ohm
Five resistors of given values are connected together as shown in the figure. The current in the arm BD will be
Half the current in the arm ABC
Zero
Twice the current in the arm ABC
Four times the current in the arm ABC
In the network shown in the figure, each of the resistance is equal to 2 Ω. The resistance between the points A and B is
(4) 2 Ω
(2) 4 Ω
In the arrangement of resistances shown below, the effective resistance between points A and B is
20 Ω
30 Ω
90 Ω
110 Ω
In the Wheatstone's bridge shown, P = 2 Ω, Q = 3 Ω, R = 6 Ω and S = 8 Ω. In order to obtain balance, shunt resistance across 'S' must be [SCRA 1998]
6 Ω
Potential difference between the points P and Q in the electric circuit shown is
4.5 V
1.2 V
2.4 V
2.88 V
In a typical Wheatstone network, the resistances in cyclic order are A = 10 Ω, B = 5 Ω, C = 4 Ω and D = 4 Ω for the bridge to be balanced
10 Ω should be connected in parallel with A
10 Ω should be connected in series with A
5 Ω should be connected in series with C
5 Ω should be connected in parallel with B
In the circuit shown in figure, the current drawn from the battery is 4A. If 10 Ω resistor is replaced by 20 Ω resistor, then current drawn from the circuit will be
3 A
4 A
If each of the resistance of the network shown in the figure is R, the equivalent resistance between A and B is
5 R
3 R
R
R/2
Thirteen resistances each of resistance R ohm are connected in the circuit as shown in the figure below. The effective resistance between A and B is
2R Ω
4R3 Ω
2 R3 Ω
R Ω
For what value of unknown resistance X, the potential difference between B and D will be zero in the circuit shown in the figure
5 Ω
Which arrangement of four identical resistances should be used to draw maximum energy from a cell of voltage V
An unknown resistance R1 is connected in series with a resistance of 10 Ω. This combinations is connected to one gap of a metre bridge while a resistance R2 is connected in the other gap. The balance point is at 50 cm. Now, when the 10 Ω resistance is removed the balance point shifts to 40 cm. The value of R1 is (in ohm)
60
40
20
10
A wire has a resistance of 6 Ω. It is cut into two parts and both half values are connected in parallel. The new resistance is :
12 Ω
1.5 Ω
Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between
P and Q
Q and R
P and R
Any two points
The total current supplied to the circuit by the battery is:
6 A
An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii of the wires are in the ratio of 4/3 and 2/3, then the ratio of the currents passing through the wire will be
3
1/3
8/9
2
2. 0.6 V
0.4 V
3. 1.2 V
In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to 3 volt. The voltage across the resistance R4 is
1.5 V
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