Electricity Important Questions The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V. The V-I graph of three resistors is shown below. Which resistor has maximum […]
Electricity Previous Years Questions Define 1 kilowatt hour. [1 mark] [CBSE 2019] The values of mA and µA are: [1 mark] [CBSE 2020] 10-6 A and 10-9 A respectively 10-3 A and 10-6 A respectively 10-3 A and 10-9 A respectively 10-6 A and 10-3 A respectively A cylindrical conductor of length ‘l’ and uniform area of cross-section ‘A’ has resistance ‘R’. Another […]
Electricity Important Questions : Solutions The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V.Sol: Here, V = 60 V and I = 4 A Using, […]
Electricity Previous Years Questions : Solutions Define 1 kilowatt hour. [1 mark] [CBSE 2019]Sol: Electrical energy consumed by apliances is said to be 1 kilowatt hour if, it operates power of 1000 watt in 1 hour. The values of mA and µA are: [1 mark] [CBSE 2020] 10-6 A and 10-9 A respectively 10-3 A and 10-6 A respectively […]
Electricity Notes Charge(Q):- Electric charge is the basic physical property of matter that causes it to experience a force when kept in an electric or magnetic field. It can be positive or negative. S.I. unit – Coulomb (C) Quantisation of Charge:- Every charge is an integral multiple of a basic charge i.e., charge on an electron(e–). […]