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Electric Circuits
Subject Physics
Q1. In the verification of Ohm's Law, what is observed when the ratio of potential differences and current (V/I) is calculated for all the readings? What do you conclude?
Q2. The values of current I flowing in a given resistor for the corresponding values fo potential difference V across the resistor are given below:
I (amperes) 0.5 1.0 2.0 2.5 3.0 4.0
V (volts) 0.1 0.2 0.4 0.5 0.6 0.8
Plot a graph between V and I and calculate the resistance of that resistor.
Q3. The potential difference between the terminals of an electric heater is 250 V, when it draws a current of 10 A. What current will the heater draw, if the potential difference is increased to 300 V?
Q4. What will be resistance of a metal wire of length 2 m and area of cross section 1.25×10-6 m2, if the resistively of the metal is 1.6 × 10-8 Ωm ?
Q1. In the verification of Ohm's Law, what is observed when the ratio of potential differences and current (V/I) is calculated for all the readings? What do you conclude?
Q2. The values of current I flowing in a given resistor for the corresponding values fo potential difference V across the resistor are given below:
I (amperes) 0.5 1.0 2.0 2.5 3.0 4.0
V (volts) 0.1 0.2 0.4 0.5 0.6 0.8
Plot a graph between V and I and calculate the resistance of that resistor.
Q3. The potential difference between the terminals of an electric heater is 250 V, when it draws a current of 10 A. What current will the heater draw, if the potential difference is increased to 300 V?
Q4. What will be resistance of a metal wire of length 2 m and area of cross section 1.25×10-6 m2, if the resistively of the metal is 1.6 × 10-8 Ωm ?
Electric Circuits
:A bubble originating at the bottom of a lake rises to the surface within 10.0 seconds with an acceleration of 10.0 meters/second2. What is the depth of the lake?Select one of the options below as your answer:100 meters 200 meters 300 meters 400 meters 500 meters
Electric Circuits
the potential difference of a cell on open circuit is 6V which falls to 4V when a current of 4A is drawn from the cell.find the internal resistance of the cell.
Electric Circuits
Good morning sir what is candela which is intensity of light unit and how can we measure the intensity of light. which instruement we use to measure it?
Electric Circuits
what are the branches of physics?
Electric Circuits
calculate the total electric flux linked with a circular disc of radius a situated at distance R from a point charge q?
Electric Circuits
AN ELECTRIC GRYSER IS KNOWN TO CONSUME 2.2 UNITS OF ELECTRICAL ENERGY PER HOUR OF ITS USE.IT IS DESIGNED TO WORK ON THE MAIN VOLTAGE OF 220V.
a)what is the power rating of the device?
b)what is the current flowing through the device when it is connected across the main?
c)what is the resistance of the device?
d)does the resistance of the device remain constant during its working?
e)which of the two has higher volts?-a)100w,220v lamp b)10w,220v night lamp
a)what is the power rating of the device?
b)what is the current flowing through the device when it is connected across the main?
c)what is the resistance of the device?
d)does the resistance of the device remain constant during its working?
e)which of the two has higher volts?-a)100w,220v lamp b)10w,220v night lamp
Electric Circuits
What is ohm's law?
Electric Circuits
The resistance of aluminium wire of 2 meter length is 7 ohm.What will be the resistance of wire of 8 metre length and of same cross - section area
Electric Circuits
A wire of resistance 4ohm is bent in form of a circle.What will be the effective resistance between ends of its diameter
