Physics
A thin semicircular conducting the ring (PQR) of radius ′r′ is falling with its plane vertical in a horizontal magnetic field B, as shown in figure. The potential difference developed across the ring when its speed is v, is
19
Aug
A thin semicircular conducting the ring (PQR) of radius ′r′ is falling with its plane vertical in a horizontal magnetic field B, as shown in figure. The potential difference developed across the ring when its speed is v, is A thin semicircular conducting the ring (PQR) of radius ′r′ is falling with its plane vertical [...]
The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is:
19
Aug
The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is: 40 V and 100 V respectively in an L-C-R circuit. The power factor of this circuit is: capacitance and inductance are 80 V The potential differences [...]
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is:
19
Aug
The condition under which a microwave oven heats up a food item containing water molecules most efficiently is: The condition under which a microwave oven heats up a food item containing water molecules most efficiently is: August 19, 2020 Category: Chapter 27 - Alternating Current , NEET Last 32 Years Solved 1988 - 2019 Physics [...]
In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45 degree. The value of C is
19
Aug
In a circuit, L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45 degree. The value of C is C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45 degree. [...]
A coil of inductive reactance 31 ohm has a resistance of 8 ohm. It is placed in series with a condenser of capacitative reactance 25 ohm. The combination is connected to an AC source of 110V. The power factor of the circuit is
19
Aug
A coil of inductive reactance 31 ohm has a resistance of 8 ohm. It is placed in series with a condenser of capacitative reactance 25 ohm. The combination is connected to an AC source of 110V. The power factor of the circuit is What is the value of inductance L for which the current is [...]
What is the value of inductance L for which the current is maximum in a series LCR circuit with C= 10 μF and ω =1000 S^-1
19
Aug
What is the value of inductance L for which the current is maximum in a series LCR circuit with C= 10 μF and ω =1000 S^-1 What is the value of inductance L for which the current is maximum in a series LCR circuit with C= 10 μF and ω =1000 S^-1 August 19, 2020 [...]
Which of the following combinations should be selected for better turning of an L-C-R circuit used for communication ?
19
Aug
Which of the following combinations should be selected for better turning of an L-C-R circuit used for communication ? Which of the following combinations should be selected for better turning of an L-C-R circuit used for communication ? August 19, 2020 Category: Chapter 27 - Alternating Current , NEET Last 32 Years Solved 1988 - [...]
Figure shows a circuit that contains three identical resistors with resistance R=9.0 Ω each, two identical inductors with inductance L=2.0 mH each, and an ideal battery with emfε=18 V. The current ‘i’ through the battery just after the switch closed is, ….
19
Aug
Figure shows a circuit that contains three identical resistors with resistance R=9.0 Ω each, two identical inductors with inductance L=2.0 mH each, and an ideal battery with emfε=18 V. The current ‘i’ through the battery just after the switch closed is, …. and an ideal battery with emfε=18 V. The current 'i' through the battery [...]
In the given circuit the reading of voltmeter V1 and V2 are 300 volts each. The reading of the voltmeter V3 and ammeter A are respectively
19
Aug
In the given circuit the reading of voltmeter V1 and V2 are 300 volts each. The reading of the voltmeter V3 and ammeter A are respectively In the given circuit the reading of voltmeter V1 and V2 are 300 volts each. The reading of the voltmeter V3 and ammeter A are respectively August 19, 2020 [...]
In an ac circuit an alternating voltage e =200√2 sin 100 t V is connected to a capacitor of capacity 1μF.The rms value of the current in the circuit is
19
Aug
In an ac circuit an alternating voltage e =200√2 sin 100 t V is connected to a capacitor of capacity 1μF.The rms value of the current in the circuit is In an ac circuit an alternating voltage e =200√2 sin 100 t V is connected to a capacitor of capacity 1μF.The rms value of the [...]