Question 1 :
Consider the following two statements:<br>(A) Kirchhoff's Junction Law follows from conservation of charge.<br>(B) Kirchhoff's Loop Law follows from conservative nature of electric field.<br>
Question 2 :
The equivalent resistance due to series connection of $10 \Omega$ and $10 \Omega$ resistors is <br/>
Question 3 :
For a chosen non-zero value of voltage, there can be more than one value of current in:<br/>
Question 4 :
The smallest resistance that can be obtained by the combination of  $n$ resistors, each of resistance  $R$ is:
Question 6 :
If n resistance (each R) are connected in series then their resultant will be
Question 7 :
The resistance of a semiconductor material (germanium or silicon)_______ with rise in temperature.
Question 8 :
In a metre bridge experiment null point is obtained at $40$cm form one end of the wire when resistance X is balanced against another resistance Y. If X $<$ Y, then the new position of the null point from the same end, if one decides to balance a resistance of $3$X against Y, will be close to.
Question 9 :
If masses of three wires of copper are in the ratio of 1 : 3 : 5 and there lengths are in the ratio of 5 : 3 : 1, then ratio of their electrical resistance is
Question 10 :
A potentiometer wire is $100\ $cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at $50$ cm and $10$ cm from the positive end of the wire in the two cases. The ratio of emf's is:
Question 11 :
A 16 pF capacitor is connected to 70 V supply. The amount of electric energy stored in the capacitor is:
Question 12 :
The amount of work done is increasing the voltage across the plates of a capacitor from $5V$ to $10V$ is $W$. The work done in increasing it from $10V$ to $15V$ will be :
Question 13 :
A capacitor having capacity of $2.0\mu F$ is charged to $200\ V$ and then the plates of the capacitors are connected to a resistance wire. The heat produced in joule will be :
Question 14 :
The capacity of a condenser is 20$\mu F$ $\displaystyle $ and the potential is 20 V. The energy released an discharging it fully will be
Question 15 :
A capacitor of capacity C$_{1}$ charged up to V volt and then connected to an uncharged capacitor C$_{2}$.Then final P.D. across each will be:
Question 16 :
A parallel plate capacitor of $1\mu F$ capacity is discharging through a resister. If its energy reduces to half in one second. The value of resistance will be?
Question 17 :
The capacity of a condenser is $4 \times 10^{-6}$ farad and its potential is 100 volts. The energy released on discharging it fully will be
Question 18 :
Capacitance of a capacitor made by a thin metal foil is $\displaystyle 2\mu F$. If the foil is folded with paper of thickness 0.15 mm, dielectric constant of paper is 2.5 and width of paper is 400 mm, the length of the foil will be :<br/>
Question 19 :
A pendulum with a bob hanging is suspended such that the electric field is in upward direction. At equilibrium of the bob, the change in tension in the string will be (assuming rest condition) :<br/>
Question 20 :
A cube of a metal is given a positive charge Q. For this system, which of the following statements is true?<br>
Question 22 :
Two fixed charges separated by a distance $d$ experience a force $F$. A dielectric medium of thickness $\dfrac{d}{4}$ and dielectric constant $4$ is introduced in the space between them. Find the new force between the charges.
Question 24 :
If a body acquires electric charge temporarily under the influence of charged body, then the process is called:
Question 25 :
Two spheres of radii 2 cm and 3 cm have equal surface charge density. Calculate the ratio of their charges.
Question 26 :
In a region of space, the electric field is given by $\vec {E} = 8\hat {j} + 4\hat {j} + 3\hat {k}$. The electric flux through a surface of area of $100$ units in $x - y$ plane is?
Question 28 :
Identify the conductors from the following: <br/>Eraser, paper, matchstick, copper wire, polythene.<br/>
Question 29 :
A glass rod rubbed with silk is brought near the fur rubbed with an ebonite rod. What will be your observation between them? <br>
Question 32 :
Assertion: STATEMENT-1 : The current density $\vec{J}$ at any point in ohmic resistor is in direction of electric field $\vec{E}$ at that point.
Reason: STATEMENT-2 : A point charge when released from rest in a region having only electrostatic field always moves along electric lines of force.
Question 34 :
Charges $Q_1$ and $Q_2$ lie inside and outside respectively of a closed surface S. Let E be the field at anypoint on S and $\phi$be the flux of E over S
Question 35 :
A sphere of radius R carries charge such that its volume charge density is proportional to the square of the distance from the center. What is the ratio of the magnitude of the electric field at distance 2R from the center to the magnitude of the electric field at a distance of R/2 from the center?
