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What is wattless current?
Wattless current is the current that does not dissipate power in a circuit, even though current flows. It occurs in purely inductive or capacitive circuits where the power factor is zero, and no net energy is transferred. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/phRead more
Wattless current is the current that does not dissipate power in a circuit, even though current flows. It occurs in purely inductive or capacitive circuits where the power factor is zero, and no net energy is transferred.
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If g is the acceleration due to gravity on the earth’s surface, the gain in the potential energy of an object of mass m raised from the surface of the earth to a height equal to the radius R of the earth, is
If g is the acceleration due to gravity on the Earth's surface, the gain in potential energy of an object of mass m, when raised from the surface of the Earth to a height equal to the Earth's radius R, can be calculated by considering the change in gravitational potential energy. The potential energRead more
If g is the acceleration due to gravity on the Earth’s surface, the gain in potential energy of an object of mass m, when raised from the surface of the Earth to a height equal to the Earth’s radius R, can be calculated by considering the change in gravitational potential energy. The potential energy at the Earth’s surface and at the height R are compared, and the difference gives the gain in potential energy. This results in a gain of half the product of the object’s mass, gravitational acceleration, and the radius of the Earth.
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See lessDifine the term ‘mutual inductance’ between the two coils.
Mutual inductance between two coils is the amount of magnetic flux linked with one coil when a unit current flows through the other coil. It quantifies the coupling effect between the coils due to magnetic interaction. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physiRead more
Mutual inductance between two coils is the amount of magnetic flux linked with one coil when a unit current flows through the other coil. It quantifies the coupling effect between the coils due to magnetic interaction.
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A bulb and a capacitor are connectedin series to an a.c. source of variable frequency. How will the brightness of the bulb change on increasing the frequency of the a.c. source. Give reason.
When a bulb and capacitor are connected in series to an A.C. source, increasing the frequency reduces the capacitive reactance X c, which decreases the circuit's impedance. As a result, current increases, making the bulb's brightness increase with frequency. For more visit here: https://www.tiwariacRead more
When a bulb and capacitor are connected in series to an A.C. source, increasing the frequency reduces the capacitive reactance X c, which decreases the circuit’s impedance. As a result, current increases, making the bulb’s brightness increase with frequency.
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Can the instantaneous power output of an a.c. source ever be negative? can the average power output be negative?
Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive. For more visit here: https://www.tiwariacademy.coRead more
Yes, the instantaneous power output of an A.C. source can be negative because power oscillates with the changing voltage and current. However, the average power output can never be negative since the net energy transfer over a cycle remains positive.
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See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-7/