Question:
Air cored choke coil and delectric bulb are connected in series with $A.C$. mains. A soft iron rod is inserted in coil then the intensity of electric bulb will be :
Air cored choke coil and delectric bulb are connected in series with $A.C$. mains. A soft iron rod is inserted in coil then the intensity of electric bulb will be :
Updated On: Jul 28, 2022
- decrease
- increase
- fluctuate
- unchanged
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
When a soft iron rod is inserted into the coil then its magnetism increases, due to which induced e.m.f. increase and it will oppose the external c.m.f. so e.m.f. across bulb increases, so the intensity of bulb increases.
Was this answer helpful?
0
0
Top Questions on AC Voltage
- In \(AC\) circuit with source voltage \(E \) = \(20\) \(sin\; 1000 \;t\) is connected to series \(L-R\) circuit whose power factor is \(\frac{1}{\sqrt 2}\) If \(E = 25\) \(sin \;2000\) \(t\), the new power factor is :
- JEE Main - 2024
- Physics
- AC Voltage
- Alternating voltage and current in circuit is given as \(V = (100 \;sin \;ωt)\) volt
\(I = 100\;sin\bigg(ωt+\frac{π}{3}\bigg)mA\)
Find average power dissipated in circuit.- JEE Main - 2024
- Physics
- AC Voltage
- A student is provided with a variable voltage source V, a test resistor Rr = 10Ω, two identical galvanometers G1 and G2 and two additional resistors, R1 = 10MΩ and R2 = 0.001Ω. For conducting an experiment to verify ohms law, the most suitable circuit is
- JEE Main - 2023
- Physics
- AC Voltage
- The I–V characteristics of a p-n junction diode in forward bias is shown in the figure. The ratio of dynamic resistance, corresponding to forward bias voltage of 2 V and 4 V respectively, is
- JEE Main - 2022
- Physics
- AC Voltage
- The maximum and minimum voltage of an amplitude modulated signal are 60 V and 20 V, respectively. The percentage modulation index will be:
- JEE Main - 2022
- Physics
- AC Voltage
View More Questions
Questions Asked in Rajasthan PMT exam
- 300 cal of heat is supplied to raise the temperature of 50 g of air from $ 20{}^\circ C $ to $ 30{}^\circ C $ without any change in its volume. Change in internal energy per gram of air is
- Rajasthan PMT - 2011
- internal energy
- The velocity of water flowing in a non-uniform tube is 20 cm/s at a point where the tube radius is 0.2 cm. The velocity at another point, where the radius is 0.1 cm, is
- Rajasthan PMT - 2011
- mechanical properties of fluid
- Block A of mass 4 kg and block B of mass 6 kg are resting on a horizontal surface as shown in the figure. There is no friction between the block B and the horizontal surface. The coefficient of friction between the blocks is 0.2. If the value of $ g=10\,m/{{s}^{2}}, $ the maximum horizontal force F that can be applied on block B without any relative motion between A and B is
- The excess pressure inside a soap bubble A is twice that in another soap bubble B. The ratio of volumes of A and B is
- Rajasthan PMT - 2011
- Surface tension
- The unit of surface tension is
- Rajasthan PMT - 2011
- Surface tension
View More Questions
Concepts Used:
AC Voltage
When voltage changes its direction after every half cycle is known as alternating voltage. The current flows in the circuit at that time are known as alternating current. The alternating current(AC) follows the sine function which changes its polarity concerning time. Most of the electrical devices are operating on the ac voltage.
