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 :
1. 12 Ω
2. 1.5 Ω
3. 3 Ω
4. 6 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
1. P and Q
2. Q and R
3. P and R
4. Any two points
The total current supplied to the circuit by the battery is:
1. \(1~\text{A}\)
2. \(2~\text{A}\)
3. \(4~\text{A}\)
4. \(6~\text{A}\)
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
1. 3
2. 1/3
3. 8/9
4. 2
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 \(R_4\) is:
1. \(0.4\) V
2. \(0.6\) V
3. \(1.2\) V
4. \(1.5\) V
If you are provided three resistances 2 Ω, 3 Ω and 6 Ω. How will you connect them so as to obtain the equivalent resistance of 4 Ω
1.
2.
3.
4. None of these
The equivalent resistance and potential difference between A and B for the circuit is respectively
1. 4 Ω, 8 V
2. 8 Ω, 4 V
3. 2 Ω, 2 V
4. 16 Ω, 8 V
Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be
1.
2.
3.
4.
For the network shown in the figure the value of the current i is
1.
2.
3.
4.
When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, the resistance between any two of diametrically opposite points will be :
1.
2.
3. 4R
4.