Potential Difference

Q. We have an electric kettle rated at $60V,5A$ that runs for $5$ minutes. The same amount of energy is used to accelerate a mass of $10kg$. What is the velocity attained​ by the​​​​​​ mass?

1. $100\sqrt{5}m{s}^{-1}$

2. $50\sqrt{5}m{s}^{-1}$

3. $30\sqrt{5}m{s}^{-1}$

4. $60\sqrt{5}m{s}^{-1}$

Q.

When an ideal conductor is connected to the terminals of a battery of 5V, the potential difference between the two terminals becomes

1. zero

2. 5 V

3. infinite

4. 2.5 V

Q.

What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?

1. 3.2 J
2. 0.2 J
3. 1.2 J
4. 0.4 J

Q.

Calculate the effective potential difference for the cells in series given below.

1. $20V$
2. $24V$
3. $26V$
4. $25V$

Q. The "amount of electricity" as observed by Henry Cavendish is the quantity that we refer to today as

1. Mass
2. None of the above
3. Current
4. Voltage

Q.

Electric potential difference between two points is the work done to move a unit charge from one point to the other.

1. True
2. False

Q. Potential difference is applied across the ends of a conductor. Choose the correct statement.

1. Electrons move from the point which is at higher potential to the point which is at lower potential
2. Electrons move from the point which is at lower potential to the point which is at higher potential
3. Protons move from the point which is at lower potential to the point which is at higher potential
4. Protons move from the point which is at higher potential to the point which is at lower potential

Q.

The water is flowing from a certain height on the paddle wheel. The water is going to turn a paddle wheel much quicker if _______.

1. Higher
2. Lower
3. Water from any height will turn the paddle wheel equally.
4. Data insufficient

Q.

Two points have a potential difference of 10 V. After connecting a conductor with zero resistance between the points, the final potential at each point becomes 25 V. What could be their initial potentials?

1. 25V and 35V
2. 20V and 30V
3. 30V and 40V
4. 35V and 45V

Q.

A point is said to have a high potential when there is a higher deficiency of ___ at that point.

1. Protons
2. Neutrons
3. Atomic nuclei
4. Electrons