Advertisements
Advertisements
Questions
Define 1 volt PD.
Define one volt potential difference between two points in an electric field.
Solution
The potential difference between two points is said to be 1 volt if 1 joule of work is done in moving 1 coulomb of electric charge from one point to another.
1 volt (V) = `(1 "joule (J)")/(1 "coulomb (C)")`
RELATED QUESTIONS
The potential difference applied across a given resistor is altered so that the heat produced per second increases by a factor of 9. By what factor does the applied potential difference change?
In the figure shown, an ammeter A and a resistor of 4 Ω are connected to the terminals of the source. The emf of the source is 12 V having an internal resistance of 2 Ω. Calculate the voltmeter and ammeter readings.
A metal rod of square cross-sectional area A having length l has current I flowing through it when a potential difference of V volt is applied across its ends (figure I). Now the rod is cut parallel to its length into two identical pieces and joined as shown in figure II. What potential difference must be maintained across the length of 2l. so that the current in the rod is still I?
Draw a schematic diagram and explain the working of Van de Graff generator device.
The figure shows a plot of three curves a, b, c, showing the variation of photocurrent vs collector plate potential for three different intensities I1, I2and I3 having frequencies v1, v2 and v3 respectively incident of a photosensitive surface.
Point out the two curves for which the incident radiations have same frequency but different intensities.
Both the capacitors shown in figure are made of square plates of edge a. The separations between the plates of the capacitors are d1 and d2 as shown in the figure. A potential difference V is applied between the points a and b. An electron is projected between the plates of the upper capacitor along the central line. With what minimum speed should the electron be projected so that it does not collide with any plate? Consider only the electric forces.
Find the potential difference `V_a - V_b` between the points a and b shown in each part of the figure.
Find the potential difference between the points A and B and between the points B and C of the figure in steady state.
A charge of `+2.0 xx 10^-8 C` is placed on the positive plate and a charge of `-1.0 xx 10^-8 C` on the negative plate of a parallel-plate capacitor of capacitance `1.2 xx 10^-3 "uF"` . Calculate the potential difference developed between the plates.
A charge of 20 µC is placed on the positive plate of an isolated parallel-plate capacitor of capacitance 10 µF. Calculate the potential difference developed between the plates.
The capacitance between the adjacent plates shown in figure is 50 nF. A charge of 1⋅0 µC is placed on the middle plate. (a) What will be the charge on the outer surface of the upper plate? (b) Find the potential difference developed between the upper and the middle plates.
Two capacitors of capacitance 20⋅0 pF and 50⋅0 pF are connected in series with a 6⋅00 V battery. Find (a) the potential difference across each capacitor and (b) the energy stored in each capacitor.
What will be the potential difference in the circuit when direct current is passed through the circuit?
In circuits, a difference in potential from one point to another is often called ______.
Two metal pieces having a potential difference of 800 V are 0.02 m apart horizontally. A particle of mass 1.96 × 10–15 kg is suspended in equilibrium between the plates. If e is the elementary charge, then charge on the particle is ______.
On moving a charge of Q coulomb by X cm, W J of work is done, then the potential difference between the points is ______.
- It depends only on the initial and final position.
- It is the work done per unit positive charge in moving from one point to other.
- It is more for a positive charge of two units as compared to a positive charge of one unit.
An α-particle and a proton are accelerate at same potential difference from rest. What will be the ratio of their final velocity?
A bullet of mass of 2 g is having a charge of 2 µc. Through what potential difference must it be accelerated, starting from rest, to acquire a speed of 10 m/s.
