Table of Contents
- 1 What is the reason that the bulb does not glow in the following circuit?
- 2 What can be the reason that bulb in the circuit does not glow even with the switch in it on position write 3 points?
- 3 Why do a bulb connected in circuit glow for while and then go off when key is switched off?
- 4 Why does the bulb not glow when the switch is off?
- 5 When AC passing through the inductor the energy is returned by the inductor in which quarter?
- 6 Why would lights not work?
- 7 Why do light bulbs glow brighter in series or parallel?
- 8 What is the difference between series and parallel circuit light bulbs?
What is the reason that the bulb does not glow in the following circuit?
Explanation: The bulb may not glow because of the following reasons: (i) Liquid in the beaker may be non-conducting. In such a case, the electric current would not be able to pass through the liquid. Hence, the circuit will not be complete.
What can be the reason that bulb in the circuit does not glow even with the switch in it on position write 3 points?
Cells are not connected properly. Rubber band which is used in the cell holder is not tight enough to keep two cells in contact with each other. Bulb can be fused. Switch is not functioning properly.
What happens to brightness of electric bulb connected in series with an inductor when a soft iron rod is inserted inside inductor?
ii) When a soft iron rod is inserted in the circuit, L increases. Therefore, inductive reactance also increases. Net resistance increases and flow of current in the circuit decreases. Thus, the brightness of the bulb will decrease.
What could be the possible reason for the bulb not lighting up?
The light fixture or lamp may have a loose electrical connection, loose contacts, or a damaged contact in the socket base itself. If one particular lamp or light fixture is a particular culprit when it comes to burned-out bulbs, it’s a strong indication that the problem lies with one particular socket.
Why do a bulb connected in circuit glow for while and then go off when key is switched off?
When the terminals of the bulb are connected with that of the electric cell by wires, the current passes through the filament of the bulb. This makes the bulb glow.
Why does the bulb not glow when the switch is off?
The torch bulb does not glow when the switch is turned off, because the switch open, breaks, or disconnect, the circuit inside the torch. The torch bulb produces light when the positive and negative terminals of the dry cells are connected to the bulb, and the switch is moved to the on position.
What are the conditions for the bulb to light up?
When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.
How does the brightness of the bulb change when number of turns of the inductor is reduced?
(i) When number of turns in an inductor is increased, inductance will increase as (L∝n2) the current in the circuit will decrease. Hence. The brightness of the bulb will decrease.
When AC passing through the inductor the energy is returned by the inductor in which quarter?
¼
Thus, the voltage across an inductor leads the current through that inductor by ¼ (quarter) cycle.
Why would lights not work?
When it’s a lamp that’s not working properly, it could have something to do with the switch. Try testing the lightbulb in a different light fixture – if it works, the lamp itself may be old or faulty. The outlet. A malfunctioning outlet could also be the root of the problem.
Why does a bulb not glow when its filament is broken?
When the filament of a bulb is broken then the bulb is said to be fused. Since the filament is broken there will be no flow of electricity in the circuit. Hence, the bulb will not glow.
Why doesn’t a light bulb glow when connected to two wires?
To obtain flow of Electric current we need potential difference between positive and negative, if you connect both the wires to any one of the terminal of cell no current flows, hence the bulb doesn’t glow. Similarly water also doesn’t flow on the same level with zero potential difference. Water flows from high level to low level.
Why do light bulbs glow brighter in series or parallel?
The bulb which dissipates more power will glow brighter. In series, both bulbs have the same current flowing through them. The bulb with the higher resistance will have a greater voltage drop across it and therefore have a higher power dissipation and brightness. In parallel, both bulbs have the same voltage across them.
What is the difference between series and parallel circuit light bulbs?
In a series circuit, 80W bulb glows brighter due to high power dissipation instead of a 100W bulb. In a parallel circuit, 100W bulb glows brighter due to high power dissipation instead of an 80W bulb. The bulb which dissipates more power will glow brighter. In series, both bulbs have the same current flowing through them.
What happens when you put LED bulbs in series with filament?
When placed in series with the LED, the current passing through the LED is also passing through the bulb, but the heat going into the filament (current squared, multipled by bulb resistance) is insufficient for the filament to get hot enough to produce visable light.