Advertisements
Advertisements
प्रश्न
The diagram below shows a magnetic kept just below the conductor AB which is kept in North South direction.
(i) In which direction will the needle deflect when the key is closed ?
(ii) Why is the deflection produced ?
(iii) What will be the change in the deflection if the magnetic needle is taken just above the conductor AB ?
(iv) Name one device which works on this principle.
Advertisements
उत्तर
(i) Eest direction
(ii) The needle align itself with the direction of magnetic field lines. Since the lines are perpendicular to the direction of current, the needle will try to allign that way also.
(iii) The northpole of the compass needle deflects towards West.
(iv) Electric motor
APPEARS IN
संबंधित प्रश्न
What is the meaning of the symbol kWh? Which quantity does it represent?
An electric fan runs from the 230 V mains. The current flowing through it is 0.4 A. At what rate is electrical energy transferred by the fan?
Define kilowatt-hour.
Of the three connecting wires in a household circuit: Which two of the three wires are at the same potential? In which of the three wires should the switch be connected?
An electric bulb is marked 100 W, 230 V. What does this mean?
State the reason why, in a three pin plug, the earth pin is longer and thicker than the other two.
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
Out of the three fuses with current ratings 5A, 10A, 15A, which one is to be connected in a geyser circuit marked 3 kW, 220V? Give reason for your answer.
The resistance of filament of an electric heater is 500 Ω It is operated at 200V for 1 hour daily. Calculate the current drawn by the heater and the energy consumed in kWh, by the heater in a month of 30 days.
