Advertisements
Advertisements
Question
What potential difference is needed to drive a current o f 1 A through a 5 Ω resistor?
Solution
Let the required potential difference be V
Given, current I = 1 A and Resistance, R = 5 Ω
AIC to Ohm's law,
V = IR= (1) x (5) = 5 volt
APPEARS IN
RELATED QUESTIONS
In series combination which remains constant?
(a) Voltage
(b) Current
(c) Both current and voltage
(d) Both are variables
How does the resistance of a wire change when:
its length is tripled?
A graph is plotted taking p.d. along y-axis and electric current along x-axis. Name the physical quantity that represents the slope of this graph (Fig.).
How does the resistivity of a semiconductor depend on temperature?
State expression for Resistance connected in series.
State and explain the laws of resistance.
Two wires of the same length and area made of two materials of resistivity ρ1 and ρ2 are connected in series to a source of potential V. The equivalent resistivity for the same area is:
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be:
