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Two insulated light rods of length l and 2l are placed in xy plane such their mid point is origin and they are free to rotate in xy plane about z-axis. Two +q charges are fixed at two ends of bigger rod and two - q charges are fixed at two ends of smaller rod.
Electric field at point (a,0,0) is E. Now if a>>l then
The correct answer is:
Related Questions to study
physics-
Two insulated light rods of length l and 2l are placed in xy plane such their mid point is origin and they are free to rotate in xy plane about z-axis. Two +q charges are fixed at two ends of bigger rod and two - q charges are fixed at two ends of smaller rod.
What is electric dipole moment of system ?
Two insulated light rods of length l and 2l are placed in xy plane such their mid point is origin and they are free to rotate in xy plane about z-axis. Two +q charges are fixed at two ends of bigger rod and two - q charges are fixed at two ends of smaller rod.
What is electric dipole moment of system ?
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Three points charges are placed at the corners of an equilateral triangle of side L as shown in the figure.
Three points charges are placed at the corners of an equilateral triangle of side L as shown in the figure.
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In the circuit shown in figure : 
and 
mF. Current in 
circuit is 
in 
circuit is 
and the main current is 
Phase different between and is
In the circuit shown in figure : and mF. Current in circuit is in circuit is and the main current is Phase different between and is
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In the LCR circuit shown in figure
A) current will lead the voltage
B) rms value of current is 20 A
C) power factor of the circuit is 
D) voltage drop across resistance is 100 V
In the LCR circuit shown in figure
A) current will lead the voltage
B) rms value of current is 20 A
C) power factor of the circuit is
D) voltage drop across resistance is 100 V
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In the circuit shown in fig. If both the lamps 
and 
are identical.
In the circuit shown in fig. If both the lamps and are identical.
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The vector diagram of current and voltage for a circuit is as shown. The components of the circuit will be
The vector diagram of current and voltage for a circuit is as shown. The components of the circuit will be
physics-General
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The diagram shows a capacitor C and a resistor R connected in series to an ac source. 
and 
are voltameters and A is an ammeter consider now the following statements
I) Readings in A and are always in phase
II) Reading in is ahead in phase with reading in
III) Readings in A and are always in phase which of these statements are/is correct
The diagram shows a capacitor C and a resistor R connected in series to an ac source. and are voltameters and A is an ammeter consider now the following statements
I) Readings in A and are always in phase
II) Reading in is ahead in phase with reading in
III) Readings in A and are always in phase which of these statements are/is correct
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In the circuit shown in the figure, the ac source gives a voltage V=20cos(2000t). Neglecting source resistance, the voltmeter and ammeter reading will be
In the circuit shown in the figure, the ac source gives a voltage V=20cos(2000t). Neglecting source resistance, the voltmeter and ammeter reading will be
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The resonance point in 
and 
curves is
The resonance point in and curves is
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A constant voltage at different frequencies is applied across a capacitance 
as shown in the figure. Which of the following graphs
Correctly depicts the variation of current with frequency ?
A constant voltage at different frequencies is applied across a capacitance as shown in the figure. Which of the following graphs
Correctly depicts the variation of current with frequency ?
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A box P and a coil Q are connected in series with an ac source of variable frequency. The rms value of emf of source is constant at 10 V. Box P contains a capacitance of 
in series with a resistance of 
. Coil Q has a self-inductance 
and a resistance of 
in series. The frequency is adjusted so that the maximum current flows in P and Q.
voltage across 
is.
A box P and a coil Q are connected in series with an ac source of variable frequency. The rms value of emf of source is constant at 10 V. Box P contains a capacitance of in series with a resistance of . Coil Q has a self-inductance and a resistance of in series. The frequency is adjusted so that the maximum current flows in P and Q.
voltage across is.
physics-General
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A box P and a coil Q are connected in series with an ac source of variable frequency. The rms value of emf of source is constant at 10 V. Box P contains a capacitance of in series with a resistance of . Coil Q has a self-inductance and a resistance of in series. The frequency is adjusted so that the maximum current flows in P and Q.
Maximum current through circuit is.
A box P and a coil Q are connected in series with an ac source of variable frequency. The rms value of emf of source is constant at 10 V. Box P contains a capacitance of in series with a resistance of . Coil Q has a self-inductance and a resistance of in series. The frequency is adjusted so that the maximum current flows in P and Q.
Maximum current through circuit is.
physics-General
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A box P and a coil Q are connected in series with an ac source of variable frequency. The rms value of emf of source is constant at 10 V. Box P contains a capacitance of in series with a resistance of . Coil Q has a self-inductance and a resistance of in series. The frequency is adjusted so that the maximum current flows in P and Q.
Impedance of p at this frequency is.
A box P and a coil Q are connected in series with an ac source of variable frequency. The rms value of emf of source is constant at 10 V. Box P contains a capacitance of in series with a resistance of . Coil Q has a self-inductance and a resistance of in series. The frequency is adjusted so that the maximum current flows in P and Q.
Impedance of p at this frequency is.
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We know that the amplitude of oscillating system becomes maximum, when the applied frequency is equal to the intrinsic frequency of system. And this concept can be applied even in electrical a.c circuits containing 
and 
It is being such that when the frequency of broad casting station becomes equal to frequency of radio circuit, then the impedance (equivalent resistance) of circuit becomes minimum and maximum current flows in the circuit with the result the radio station is tuned its impedance is given by
and 
Now in the given circuit as shown, at a certain moment of the values of voltages and current are given When power loss through resistor is 50 watt, then angular frequency of applied a.c voltage is
We know that the amplitude of oscillating system becomes maximum, when the applied frequency is equal to the intrinsic frequency of system. And this concept can be applied even in electrical a.c circuits containing and It is being such that when the frequency of broad casting station becomes equal to frequency of radio circuit, then the impedance (equivalent resistance) of circuit becomes minimum and maximum current flows in the circuit with the result the radio station is tuned its impedance is given by
and
Now in the given circuit as shown, at a certain moment of the values of voltages and current are given When power loss through resistor is 50 watt, then angular frequency of applied a.c voltage is
physics-General
physics-
We know that the amplitude of oscillating system becomes maximum, when the applied frequency is equal to the intrinsic frequency of system. And this concept can be applied even in electrical a.c circuits containing and It is being such that when the frequency of broad casting station becomes equal to frequency of radio circuit, then the impedance (equivalent resistance) of circuit becomes minimum and maximum current flows in the circuit with the result the radio station is tuned its impedance is given by
and
Now in the given circuit as shown, at a certain moment of the values of voltages and current are given The current in the circuit is
We know that the amplitude of oscillating system becomes maximum, when the applied frequency is equal to the intrinsic frequency of system. And this concept can be applied even in electrical a.c circuits containing and It is being such that when the frequency of broad casting station becomes equal to frequency of radio circuit, then the impedance (equivalent resistance) of circuit becomes minimum and maximum current flows in the circuit with the result the radio station is tuned its impedance is given by
and
Now in the given circuit as shown, at a certain moment of the values of voltages and current are given The current in the circuit is
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