Advertisements
Advertisements
Question
What does the positive and negative sign of potential convey?
Advertisements
Solution
The positive sign of potential conveys that work has to be done on the positive test charge against the repulsive force due to the positive charge in bringing it from infinity. The negative sign of potential conveys that work is done on the negative test charge by the attractive force.
APPEARS IN
RELATED QUESTIONS
Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change?
A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?
Define the unit of resistance (or Define the unit "ohm").
If the potential difference between the ends of a fixed resistor is halved, the electric power will become:
What is the combined resistance of each of the networks between A and B shown in fig. ?
Which one of the following is the correct set-up for studying the dependence of the current on the potential difference across a resistor and why?
Three resistors are connected to a 6 V battery as shown in the figure given below:
Calculate:
(i) the equivalent resistance of the circuit.
(ii) total current in the circuit.
(iii) potential difference across the 7.2 Ω resistor.
Find out the following in the electric circuit given in Figure
- Effective resistance of two 8 Ω resistors in the combination
- Current flowing through 4 Ω resistor
- Potential difference across 4 Ω resistance
- Power dissipated in 4 Ω resistor
- Difference in ammeter readings, if any.
Define Electric potential.
______ is work done per unit charge.
