ICSE physics
Sponsor Area
Question
What is the locus of a point at which the electric field E due to an electric dipole is parallel to the line joining the charges +q and -q forming the dipole ?
Solution
The locus will be the pair of perpendicular lines.
Sponsor Area
Question
State one important difference between Peltier’s Effect and Joule’s Effect.
Solution
Peltier’s effect: This effect may produce heating or cooling.
Joule’s effect : This effect always produce heating.
Question
Three bulbs of specifications 60 W/220 V, 100 W/220 V and 1000 W/220 V are connected in series. Which one will glow the brightest ?
Solution
In series, Power, P = I2R.
The resistance of 60 W/220 V bulb will be greater than any other given bulbs.
Brightness depends upon the power consumed.
Question
State one important property of a standard cell.
Solution
In standard cell there should be no chemical reaction in the cell expect when current is passing.
Question
A wire of resistance 20 Ω is bent in the form of a complete circle. Find the resistance between two diametrically opposite points.
Solution
The equivalent circuit, 
But R = 10
∴ Req = 5 Ω
Sponsor Area
Mock Test Series
Mock Test Series