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Figure shows some of the electric field lines corresponding to an electric field. The figure suggests
that
When the separation between two charges is increased,the electric potential energy of the charges
An electric dipole is placed in a uniform electric field.The net electric force on the dipole
The electric field in a region is directed outward and is proportional to the distance r from the origin.Taking the electric potential at the origin to be zero,
A charge Q is uniformly distributed over a large plastic plate. The electric field at a point P close to the centre of the plate is 10 V/m. If the plastic plate is replaced by a copper plate of the same geometrical dimensions and carrying the same charge Q, the electric field at the
point P will become
Electric charge are distributed in a small volume. The flux of the electric field through a spherical surface of radius 10cm surrounding the total charge is 25V-m The flux over a concentric sphere of radius 25cm will be
100V–m 4. A charge q is placed at the centre of the open end of a cylindrical vessel in figure. The flux of the electric field through the surface of the vessel is
Figure shows a closed surface which intersects a conducting sphere. If a positively charged is placed at the point P, the flux of the electric field through the closed surface
Two capacitors each having capacitance C and breakdown voltage V are joined in series. The capacitance and the breakdown voltage of the combination will be
Two metal spheres of capacitances C1 & C2 carry some charges. They are put in contact and then separated. The final charges Q1 & Q2 on them will satisfy
A dielectric slab is inserted between the plates of an isolated charged capacitor. Which of the following quantities will remain the same?
A uniform wire of resistance 50 Ω is cut into 5 equal parts. These parts are now connected in parallel. The equivalent resistance of the combination is
The net resistance of an ammeter should be small to ensure that
Consider a capacitor charging circuit. Let Q1 be the charge given to the capacitor in a time interval of 10 ms and Q2 be the charge given in the next time interval of of 10 ms. Let 10 μC charge be deposited in a time interval t1 and the next 10 μC charge is deposited in the next time interval t2. Then,
Four condensers each of capacity 4mF are connected as shown in the figure. If VP - VQ = 15 V the energy stored in the system is
If the separation between the plates of a capacitor is 5 mm, then the area of the plate of a 3 F parallel plate capacitor is
An insulated charged sphere of radius 5 cm has a potential of 10 V at the surface. The potential at the centre will be
Two materials having the dielectric constants K1 and K2, are filled between two parallel plates of a capacitor, which is shown in the figure. The capacity of the capacitor is
Two point charges Q and –2Q are placed at some distance apart. If the electric field at the location of Q is E, the electric field at the location of –2Q will be
Shown in the figure is a distribution of charges. The flux of electric field due to these charges through the surface S is
What is the equivalent resistance between A and B in the given figure ?
A battery of emf 20V and internal resistance 6 Ω is connected to a resister as shown in figure. If the current in the circuit is 1A, the resistance of the resistor will be
An electric bulb marked 40 W and 200 V, is used in a circuit of supply voltage 100 V. Its power is
A moving coil galvanometer is converted into an ammeter reading upto 0.03 A by connecting a shunt of resistance 4r across it and into ammeter upto 0.06 A, when a shunt of resistance r is used, what is the maximum current which can be sent through this galvanometer if no shunt is used
A galvanometer can withstand safely a maximum current of 5 mA. It is converted into voltmeter reading upto 20V by connecting in series an external resistance of 3.96 k Ω .The resistance of galvanometer is
Three resistors of 2 Ω , 3 Ω and 4 Ω are connected as shown in the given diagram, then the equivalent resistance will be
Direction : Read the following question and choose
A. If both Assertion and Reason are correct and reason is the correct explanation of assertion
B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion
C. If Assertion is true, but the Reason is false
D. If Assertion is false, but the Reason is true
E. If both assertion and reason are false
Assertion : The capacity of conductor, under given circumstances remains constant irrespective of the charge present on it
Reason: Capacity depends on size and shape of conductor and also on the medium between the plates.
Direction : Read the following question and choose
A. If both Assertion and Reason are correct and reason is the correct explanation of assertion
B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion
C. If Assertion is true, but the Reason is false
D. If Assertion is false, but the Reason is true
E. If both assertion and reason are false
Assertion: A small metal ball is suspended in a uniform electric field with an insulated thread. If high energy X-ray beam falls on the ball, the ball will be deflected in the electric field.
Reason : X-rays emit photoelectrons and metal becomes negatively charged
Direction: Read the following question and choose
A. If both Assertion and Reason are correct and the reason is the correct explanation of assertion
B. If both Assertion and Reason are true, but Reason is not a correct explanation of the Assertion
C. If Assertion is true, but the Reason is false
D. If Assertion is false, but the Reason is true
E. If both assertion and reason are false
Assertion: If a point charge be rotated in a circle around a charge, the work done will be zero.
Reason: Work done is equal be dot product of force and displacement.
Direction : Read the following question and choose
A. If both Assertion and Reason are correct and reason is the correct explanation of assertion
B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion
C. If Assertion is true, but the Reason is false
D. If Assertion is false, but the Reason is true
E. If both assertion and reason are false
Assertion: At a point in space, the electric field points towards north, In the region, surrounding this point the rate or change of potential will be zero along the east and west
Reason: Electric field due to a charge is the space around the charge in which some another charge experienced a force
Direction : Read the following question and choose
A. If both Assertion and Reason are correct and reason is the correct explanation of assertion
B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion
C. If Assertion is true, but the Reason is false
D. If Assertion is false, but the Reason is true
E0. If both assertion and reason are false
Assertion : At any junction of a network, algebraic sum of various currents is zero
Reason : Current cannot be stored.
Direction : Read the following question and choose
A. If both Assertion and Reason are correct and reason is the correct explanation of assertion
B. If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion
C. If Assertion is true, but the Reason is false
D. If Assertion is false, but the Reason is true
E. If both assertion and reason are false
Assertion: Kilo-watt-Hour is the unit of electric power
Reason: kWh is a commercial unit used for expressing consumed electric energy
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