Physics
A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when
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Aug
A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when August 19, 2020 Category: Chapter 26 - EMI , [...]
An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3Ω, the phase difference between the applied voltage and the current in the circuit is
19
Aug
An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3Ω, the phase difference between the applied voltage and the current in the circuit is An ac voltage is applied to a resistance R and an inductor L in series. [...]
A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is 4×10^−3Wb. The self-inductance of the solenoid is
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Aug
A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is 4×10^−3Wb. The self-inductance of the solenoid is A long solenoid has 1000 turns. When a current of 4A flows through it the magnetic flux linked with each turn of the [...]
Two coils of self-inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is:
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Aug
Two coils of self-inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil is completely linked with the other. The mutual inductance between these coils is: Two coils of self-inductances 2 mH and 8 mH are placed so close together that the effective flux in one coil [...]
A conducting square frame of side ′a′ and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity ′V′. The emf induced in the frame will be proportional to
19
Aug
A conducting square frame of side ′a′ and a long straight wire carrying current I are located in the same plane as shown in the figure. The frame moves to the right with a constant velocity ′V′. The emf induced in the frame will be proportional to A wire loop is rotated in a magnetic [...]
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced emf is
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Aug
A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced emf is A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced emf is August 19, 2020 Category: Chapter 26 - EMI , NEET Last 32 Years Solved 1988 [...]
A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate dBdt. Loop 1 of radius R r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in figure. Then, the emf generated is
19
Aug
A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate dBdt. Loop 1 of radius R r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in figure. Then, the emf generated is An [...]
A rectangular coil of length 0.12m and width 0.1m having 50 turns of wire is suspended vertically in uniform magnetic field of strength 0.2 Wb/m^2. The coil carries a current of 2 A. If the plane of the coil is inclined at an angle of 30 degree with the direction of the field, the torque required to keep the coil in stable equilibrium will be
19
Aug
A rectangular coil of length 0.12m and width 0.1m having 50 turns of wire is suspended vertically in uniform magnetic field of strength 0.2 Wb/m^2. The coil carries a current of 2 A. If the plane of the coil is inclined at an angle of 30 degree with the direction of the field, the torque [...]
An electron moves on a straight line path XY as shown. The abcd is a adjacent to the path of electron. What will be the direction of current, if any, induced in the coil?
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Aug
An electron moves on a straight line path XY as shown. The abcd is a adjacent to the path of electron. What will be the direction of current, if any, induced in the coil? An electron moves on a straight line path XY as shown. The abcd is a adjacent to the path of electron. [...]
The current l in the inductance is varying with time according to the plot shown in the figure.Which one of the following is the correct variation of voltage with time in the coil?
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Aug
The current l in the inductance is varying with time according to the plot shown in the figure.Which one of the following is the correct variation of voltage with time in the coil? The current l in the inductance is varying with time according to the plot shown in the figure.Which one of the following [...]