Physics-
General
Easy
Question
An electric field converges at the origin whose magnitude is given by the expression 
Coul, where is the distance measured from the origin.
- total charge contained in any spherical volume with its centre at origin is negative.
- total charge contained at any spherical volume, irrespective of the location of its centre, is negative.
- total charge contained in a spherical volume of radius with its centre at origin has magnitude
- All of the above
The correct answer is: All of the above
Related Questions to study
physics-
An e.m.f. 
volt is applied to an LR-circuit of inductance 3mH and resistance 4 ohms. The amplitude of current in the circuit is
An e.m.f. volt is applied to an LR-circuit of inductance 3mH and resistance 4 ohms. The amplitude of current in the circuit is
physics-General
physics-
The voltage across a pure inductor is represented by the following diagram. Which one of the following diagrams will represent the current
The voltage across a pure inductor is represented by the following diagram. Which one of the following diagrams will represent the current
physics-General
physics-
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 .
physics-General
physics-
Alternating current cannot be measured by dc ammeter because
Alternating current cannot be measured by dc ammeter because
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 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
physics-General
physics-
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
physics-General
physics-
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
physics-General
physics-
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
physics-General
physics-
A charge ' q ' is placed in a mug as shown in the figure. The radius of the circular face is ' r ' and distance between the centre of the circular face and charge is ' r '. Flux through the circular face is
A charge ' q ' is placed in a mug as shown in the figure. The radius of the circular face is ' r ' and distance between the centre of the circular face and charge is ' r '. Flux through the circular face is
physics-General
physics-
A ring of radius 
carries a non-uniform charge of linear density 
(see in the figure) Magnitude of the net dipolement of the ring is:
A ring of radius carries a non-uniform charge of linear density (see in the figure) Magnitude of the net dipolement of the ring is:
physics-General
physics-
An infinite nonconducting sheet at x=0 carries a uniform surface charge density . A thin rod of length 2 L has a uniform linear charge density 
on one half and 
on the other half. The rod is hinged at its mid point C at x=2 L and lies in the XOZ plane making an angle 
with the positive X-axis as shown in figure. The torque 
experienced by the rod is 
. The value of k is
An infinite nonconducting sheet at x=0 carries a uniform surface charge density . A thin rod of length 2 L has a uniform linear charge density on one half and on the other half. The rod is hinged at its mid point C at x=2 L and lies in the XOZ plane making an angle with the positive X-axis as shown in figure. The torque experienced by the rod is . The value of k is
physics-General
physics-
A system of two electric dipoles, each of dipole moment having magnitude P are arranged in the configuration shown in figure. The electrostatic interaction energy of this system of two dipoles is :
A system of two electric dipoles, each of dipole moment having magnitude P are arranged in the configuration shown in figure. The electrostatic interaction energy of this system of two dipoles is :
physics-General
