Physics-
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Easy
Question
Four initially uncharged thin, large, plane identical metallic plates A, B, C and D are arranged parallel to each other as shown. Now plates A, B, C and D are given charges Q,2Q,3Q and 4Q respectively. Plates A and D are connected by a metallic wire while plates B and C are connected by other metallic wire then after Electrostatic equilibrium is reached.
Charge on left surface of plate B will be
- zero
The correct answer is:
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Plates A and B constitute an isolated, charge parallel-plate capacitor. The inner surfaces (I and IV) of A and B have charges +Q and -Q respectively. A third plate C with charge +Q is now introduced midway between A and B. Which of the following statements is not correct?
Plates A and B constitute an isolated, charge parallel-plate capacitor. The inner surfaces (I and IV) of A and B have charges +Q and -Q respectively. A third plate C with charge +Q is now introduced midway between A and B. Which of the following statements is not correct?
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The current in a discharging LR circuit is given by where is the time constant of the circuit. Calculate the rms current for the period t=0 to 
.
The current in a discharging LR circuit is given by where is the time constant of the circuit. Calculate the rms current for the period t=0 to .
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Alternating current cannot be measured by dc ammeter because
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A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a sorce of alternating current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
A 12 V battery is used to supply 2.0 mA of current to the 300 turns in the primary coil of a given transformer. What is the current in the secondary coil if turns
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a sorce of alternating current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
A 12 V battery is used to supply 2.0 mA of current to the 300 turns in the primary coil of a given transformer. What is the current in the secondary coil if turns
physics-General
physics-
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound around a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a source of alternating (AC) current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
Which of the following is a correct expression for R, the resistance of the load connected to the secondary coil
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound around a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a source of alternating (AC) current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
Which of the following is a correct expression for R, the resistance of the load connected to the secondary coil
physics-General
physics-
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a sorce of alternating current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
A transformer with 40 turns in its primary coil is connected to a 120 V AC source. If 20 W of power is supplied to the primary coil, how much power is developed in the secondary coil
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a sorce of alternating current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
A transformer with 40 turns in its primary coil is connected to a 120 V AC source. If 20 W of power is supplied to the primary coil, how much power is developed in the secondary coil
physics-General
physics-
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a sorce of alternating current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
The primary coil of a transformer has 100 turns and is connected to a 120 VAC source. How many turns are in the secondary coil if there's a 2400V across it
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers. Each transformer has two coils of wire electrically insulated from each other but wound a round a common core of ferromagnetic material. The two wires are close together but do not touch each other
The primary coil is connected to a sorce of alternating current. The secondary coil is connected to resistor such as a light bulb. The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material. This in turn induces an oscillating voltage and AC current in the secondary coil
Students collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers.
The primary coil of a transformer has 100 turns and is connected to a 120 VAC source. How many turns are in the secondary coil if there's a 2400V across it
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A resistor and a capacitor are connected to an ac supply of 200 V,50 Hz in series. The current in the circuit is 2 A. If the power consumed in the circuit is 100 watt, then In the above problem, the capacitance in the circuit is
A resistor and a capacitor are connected to an ac supply of 200 V,50 Hz in series. The current in the circuit is 2 A. If the power consumed in the circuit is 100 watt, then In the above problem, the capacitance in the circuit is
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A resistor and a capacitor are connected to an ac supply of 200 V,50 Hz in series. The current in the circuit is 2 A. If the power consumed in the circuit is 100 watt, then In the above problem, the capacitive reactance in the circuit is
A resistor and a capacitor are connected to an ac supply of 200 V,50 Hz in series. The current in the circuit is 2 A. If the power consumed in the circuit is 100 watt, then In the above problem, the capacitive reactance in the circuit is
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A charged small metal sphere A hangs from a silk thread S, which makes an angle 
with a large charged nonconducting sheet having uniform surface charge density 
is proportional to
A charged small metal sphere A hangs from a silk thread S, which makes an angle with a large charged nonconducting sheet having uniform surface charge density is proportional to
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