Q) The above circuit is a part of an electrical device. Use the information given in the question to calculate the following: (i) Potential Difference across R2. (ii) Value of the resistance R2. (iii) Value of resistance R1 (CBSE Sample Paper – 2024-25) Ans: STEP BY STEP SOLUTION (i) Potential Difference across R2 : Since […]
The above circuit is a part of an electrical device. Use the information given Read More »
Q) Two resistors of resistances 2 Ω and 4 Ω are connected in a) series b) parallel with a battery of given potential difference. Compute the ratio of total quantity of heat produced in the combination in the two cases if the total voltage and time are kept the same for both. (CBSE Sample Paper –
Two resistors of resistances 2 Ω and 4 Ω are connected in Read More »
Q) As shown in the figure above A and B are two lamps. Lamp A is rated at 12 V,24W. Lamp B is rated at 6.0 V. When lamp B operates at its rated voltage, the current in it is 3.0 A. The values of R1 and R2 are chosen so that both lamps operate
As shown in the figure above A and B are two lamps. Lamp A is rated at 12 V,24W. Read More »
Q) In a household five fans each of 100W are used for 4 hours and an electric press of 500W for 2 hours every day. Calculate the cost of using the fans and electric press for 60 days if the cost of 1 unit of electrical energy is Rs. 6.5. (CBSE Sample Paper
In a household five fans each of 100W are used for 4 hours and an electric press Read More »
Q) Vinita and Ahmed demonstrated a circuit that operates the two headlights and the two sidelights of a car, in their school exhibition. Based on their demonstrated circuit, answer the following questions. (i) State what happens when switch A is connected to a) Position 2 b) Position 3 (ii) Find the potential difference across each
Vinita and Ahmed demonstrated a circuit that operates the two headlights and the Read More »