Which of the following electrical appliances work on the principle of the heating effect of electric current?
Important Questions on Electricity
Choose the correct statement(s) in the case of a voltaic cell.
(A) The material used in the cathode is zinc and that in the anode is copper.
(B) The electrolyte used is dilute sulphuric acid.
Choose the correct statement:
When a positively charged body is placed on the ground,
(A) The electrons flow from the ground and neutralize the charge.
(B) The electrons flow from the ground and charge it negatively.
A magnetic needle placed near a current-carrying conductor deflects due to the
Which of the following statements is incorrect?
The commercial unit of electrical energy is
The bulbs in houses are connected in _____.
Arrange the following steps in sequential order to demonstrate the magnetic effect of the electric current using a magnetic compass.
(A) Wind an insulated conducting wire around the magnetic compass such that the axis of the coil is directed along the east-west direction and connects the free ends of the wire to a cell through a switch.
(B) Take a magnetic compass.
(C) When current flows through the conducting wire, it behaves as a magnet and deflects the compass needle.
(D) When the switch is closed, the magnetic needle in the compass deflects from its initial position and when the switch is opened, the needle comes back to its initial position.
