Witryna1. Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle ‘θ’ with the vertical. If wires have mass λ per unit length then the value of I is: (g = gravitational acceleration) 608 Views. Answer. Witryna13 cze 2024 · Q.1. The standard resistance coil are made of manganin. Why? Answer: When current flows through a wire its temperature will increase. For alloys like manganin the. temperature coefficient of resistance is very small. Thus, even if the temperature of the coil increases. its resistance will remain constant. Q.2.
CURRENT ELECTRICITY NEET 2024 PYQ QUICK REVISION important …
Witryna1. Mobility is defined as the magnitude of the drift velocity per unit electric field. 2. 3. SI unit is m2V-1 s-1. 4. State microscopic form of Ohm’s law. Microscopic form of ohm's … Witryna12 sty 2024 · Q. 16. Electrical equipment in an office takes a current of 13 A from a 240 V supply. Estimate the cost per week of electricity if the equipment is used for 30 hours each week and 1 kWh of energy costs 7p. Q. 17. An electric heater consumes 3.6 MJ when connected to a 250 V supply for 40 minutes. oratory in montreal
IIT - JEE Main Important Questions of Current Electricity Zigya
Witryna4 gru 2024 · 1 kWh = 1 kW × 1 hr = 1 unit of electricity. Question 47: Write an expression for calculating electrical power in terms of current and resistance. Answer: Electrical power in terms of current and resistance is P = I 2 R. Question 48: Give two differences between a d.c. motor and an a.c. generator. WitrynaDistinguish between an open and a closed circuit. Q2. A current of 10\ \text A 10 A flows through a conductor for two minutes. ( \text i i) Calculate the amount of charge passed through any area of cross section of the conductor. ( \text {ii} ii) If the charge of an electron is 1.6\times10^ {-19}\ \text C 1.6×10−19 C, then calculate the ... WitrynaCurrent Electricity, Important Questions for Board Exams, NCERT Class 12 Physics Chapter 3, Important Questions of 12th Physics NCERT Chapter 3 Current Elect... oratory knightsbridge