The capacitor of capacitance 4 μF and 6 μF are connected in series. A potential difference of 500 volts is applied to the outer plates of the two capacitor system. The potential difference across the plates of capacitor of 4 μF capacitance is
|
(a) 500 volts |
(b) 300 volts |
(c) 200 volts |
(d) 250 volts |
(b) 300 volts
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
A circular loop of radius R carrying current I lies in x-y plane with its centre at origin. The total magnetic flux through x-y plane is
|
(a) Directly proportional to I |
(b) Directly proportional to R |
|
(c) Directly proportional to |
(d) Zero |
Four charges equal to – Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is
|
(a) |
(b) |
(c) - |
(d) |
Two transparent slabs have the same thickness as shown. One is made of material A of refractive index 1.5. The other is made of two materials B and C with thickness in the ratio 1 : 2. The refractive index of C is 1.6. If a monochromatic parallel beam passing through the slabs has the same number of waves inside both, the refractive index of B is
|
(a) 1.1 |
(b) 1.2 |
(c) 1.3 |
(d) 1.4 |
In an electrolysis experiment, a current i passes through two different cells in series, one containing a solution of 
and the other a solution of 
. The rate of increase of the weight of the cathodes in the two cells will be
|
(a) In the ratio of the densities of Cu and Ag |
|
(b) In the ratio of the at. weights of Cu and Ag |
|
(c) In the ratio of half the atomic weight of Cu to the atomic weight of Ag |
|
(d) In the ratio of half the atomic weight of Cu to half the atomic weight of Ag |
In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is
|
(a) 4 : 5 |
(b) 5 : 4 |
(c) 5 : 9 |
(d) 9 : 5 |
An object is at a distance of 0.5 m in front of a plane mirror. Distance between the object and image is
|
(a) 0.5 m |
(b) 1 m |
(c) 0.25 m |
(d) 1.5 m |
Boolean algebra is essentially based on
|
(a) Truth |
(b) Logic |
(c) Symbol |
(d) Numbers |
