Drift velocity vd varies with the intensity of electric field as per the relation:
1.
2.
3. vd = constant
4.
If a metallic block has no potential difference applied across it, then the mean velocity of free electron is:
(T = absolute temperature of the block)
1. | proportional to T. | 2. | proportional to\(\sqrt{\mathrm{T}} \) |
3. | zero. | 4. | finite but independent of temperature. |
A wire of resistance R is divided into 10 equal parts. These parts are connected in parallel, the equivalent resistance of such connection will be:
1. 0.01R
2. 0.1R
3. 10R
4. 100R
In the figure, the value of resistors to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is:
1. R
2.
3. 3 R
4.
A battery of e.m.f. 10 V is connected to resistance as shown in the figure below. The potential difference between the points A and B is:
1. –2 V
2. 2 V
3. 5 V
4.
What is the equivalent resistance of the circuit?
1. 6 Ω
2. 7 Ω
3. 8 Ω
4. 9 Ω
If each resistance in the figure is 9 Ω, then the reading of the ammeter is:
1. 5 A
2. 8 A
3. 2 A
4. 9 A
Equivalent resistance across terminals A and B will be:
1. 1 Ω
2. 2 Ω
3. 3 Ω
4. 4 Ω
The total current supplied to the circuit by the battery is:
1. 1 A
2. 2 A
3. 4 A
4. 6 A
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. 0.4 V
2. 0.6 V
3. 1.2 V
4. 1.5 V