Ohm's lawÂ

Q.

In case of liquids, Ohm’s law is

1. Not obeyed

2. Partially obeyed

3. Fully obeyed

4. Not applicable

Q.

The resistance of a conductor is said to be 1 ohm if

1. 1 ampere of current flows through it when the potential difference across the ends is 10 volt

2. 1 ampere of current flows through it when the potential difference across the ends is 1 volt

3. 1 ampere of current flows through it when the potential difference across the ends is 0

4. 0 ampere current flows through it when the potential difference across the ends is 1 volt

Q. A 6 V battery is connected across a lamp whose resistance is 20 $\Omega$. Calculate the value of the extra resistance in $\Omega$ which must be used in the circuit to get 0.25 A current in the circuit.

1. 4 $\Omega$

2. 6 $\Omega$

3. 2 $\Omega$

4. 8 $\Omega$

Q.

Which of the following statements does not represent ohm's law?

1. = constant

2. = constant

3. Potential difference = Current Resistance

4. Current = Resistance Potential difference

Q.

Ohmic conductors do not obey Ohm’s law.

1. True
2. False

Q.

The graph between current $\left(I\right)$ and potential difference $\left(V\right)$ in the experimental verification of Ohms Law drawn by four students. Which one is correct?

1. 

2. 

3. 

4. 

Q.

State whether the given statement is true or false: Ohm’s Law gives the relation between potential difference and current.

1. False

2. True

Q.

Define electric resistance of a conductor.

Q.

State ohms law and the equation relating current, potential difference, and resistance.

Q.

If potential difference increases, will rate of flow of electricity also increase to attain equilibrium faster?

Q.

Ohm’s Law gives the relation between potential difference and current i.e, voltage is directly and linearly proportional to current.

1. True

2. False

Q.

Difference between voltage and watt

Q.

If in a circuit we have a battery of 5v connected to a resistor of 5Ω. 2 batteries are added of same Potential difference. and polarity the current also increases in the same manner. What are the (I, v) values?

1. (1, 5); (1, 10); (1, 15)

2. (1, 5); (2, 10); (3, 15)

3. (5, 1); (10, 1); (15; 1)

4. Can't say

Q.

Which of the following relations represent the ohm's law?

1. = constant

2. = constant

3. Potential difference = current x resistance

4. Current = resistance x potential difference

Q.

Which of the following also represent the electrical energy (VIT)?

1. $\frac{VIT}{R}$

2. $I^2$RT

3. $\frac{V^2}{R}$ $T^2$

4. None of these

Q. From the graph given below, we can infer that the given conductor is in accordance with Ohm’s Law. Say True or False.

1. False
2. True

Q.

Which of the following depicts the mathematical form of Ohm’s Law?

1. $I=\left(1/R\right)\times V$
2. $V=\frac{I}{R}$
3. $I=\frac{R}{V}$
4. $R=\frac{I}{V}$

Q.

Ohm’s Law gives the relation between ?

1. Voltage, Work

2. Voltage, Current

3. Voltage, Resistance

4. Current, Resistance

Q.

When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

1. 5000 Ω

2. 4.8 Ω

3. 50 Ω

4. 4800 Ω

Q. When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

1. $4800\Omega$
2. $2400\Omega$
3. $1200\Omega$
4. $3600\Omega$

Q.

Which of the following statement(s) is/are true, regarding the electrical set-up for verification of Ohm's law?

1. The voltmeter is connected in parallel with the known resistance.

2. The ammeter is connected in series in the circuit.

3. The rheostat can only increase the resistance in the circuit.

4. There is a sliding contact on the coil which is used to change the value of resistance.