What could be the possible reason for the torch nulb not glowing even when the circuit appears to be complete?

What could be the reasons for adopting contraceptive methods?

What could be the reason for better reflection of sound by rough surfaces than polished surfaces?

A series LCR circuit with R=20 Omega , L = 1.5 H and C = 35 muF is connected to a variable frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

A battery of emf 10Vand internal resistance 3 Omega is connected to a resistor.If the current in the circuit is 0.5A, what is the resistance of the resistor ? What is the terminal voltage ot the battery when the circuit is clossed ?

The table shows the number of species of birds seen in some places. Colombia - 1400 New York - 105 Greenland - 56 India - 1200 South America (Amazon) - 1300 What could be the reason for the difference in the number of bird species present? Justify your answer.

An iron ring measuring 15.00 cm in diameter is a be shrunk on a pulley which is 15.05 cm in diameter. All measurements refer to the room temperature 20^0 C . To What minimum temperature should the ring be heated to make the job possible? Calculate the strain developed in the ring when in comes to the room temperature. Coefficient of linear expansion of iron =12 xx 10^(-6) C^(-1) .

When an AC source is connected to a capacitor there is a steady-state current in the circuit. Does it mean that the charges jump from one plate to the other to complete the circuit?

An LC circuit contains a 20 mH inductor and a 50 muF capacitor with an initial charge of 10 mС. The resistance of the circuit is negligible. Let the instant the circuit is closed be t = 0. a. What is the total energy stored initially? Is it conserved during LC oscillations? b. What is the natural frequency of the circuit? c. At what time is the energy stored i. completely electrical (i.e., stored in the capacitor) ii. completely magnetic (i.e., stored in the inductor) d. If a resistor is inserted in the circuit, how much energy is eventually dissipated as heat?