CBSE
Multiple Choice QuestionsAn 8 µF capacitor is connected across 200 V, 50 Hz line. What is the peak value of the charge through capacitor?
2.5 x 10-3 C
2.5 x 10-4 C
5 x 10-5 C
7.5 x 10-2 C
A conducting sphere ofradius 30 cm is given a charge of 1.2 x 10-8 C. What will be its potential ?
0.03 kV
0.9 kV
1.8 kV
3.6 kV
Capacitance of a parallel plate capacitor becomes times its original value if a dielectric slab of thickness is inserted between the plates, where d is the separation between the plates. The dielectric constant of the slab is
4
2
3
1
A long hollow conducting cylinder is kept co-axially inside another long and hollow conducting cylinder of larger radius. Both the cylinders are initially electrically neutral.Now consider the following statements
Which of the above mentioned statement is/are correct?
Only I
I, IV
Only II
Only III
In the shown figure, what is the potential difference between the points A and B and between B and C respectively in steady state ?
VAB = VBC = 100 V
VAB = 75 V , VBC = 25 V
VAB = 25 V , VBC = 75 V
VAB = VBC = 50 V
The electric potential V at any point x, y, z in space is given by V = 4 x2 . The electric field at the point (2, 0, 1) in Vm-1 is
10
20
− 16
30
In the circuit, shown in figure, K is open. The charge on capacitor C in steady state is q. Now, key is closed and at steady state, the charge on C is q2 the ratio of charges is
1
In a region, the potential is represented by V (x,y,z) = 6x − 8xy − 8y + 6yz where V is in volts and x,y,z are in meters. The electric force experienced by a charge of 2C situated at point (1,1,1) is
30 N
24 N
Two charges q and -3q are placed fixed on X-axis separated by distance d. Where should a third charge 2q be placed such that it will not experience any force?
A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric of dielectric constant 5, the percentage increase in the capacitance will be
400 %
66.6 %
33.3 %
200 %
