In acidic medium, changes to which has two bonds. Oxidation state of in is:-
+5
+3
+6
-10
Which of the following complexes is used as an anti-cancer agent:
Among the following complexes the one which shows zero crystal field stabilization energy (CFSE):
The force 'F' acting on a particle fo mass 'm' is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is:
24 Ns
20Ns
12Ns
6Ns
A balloon with mass 'm' is descending down with an acceleration 'a' (where a<g). How much mass should be removed from it so that it starts moving up with an acceleration 'a'?
Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by
A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximately radius would earth (mass=5.98X) have to be compressed to be a black hole?
100m
Two thin dielectric slabs of dielectric constants K_{1} and K_{2} (K_{1} < K_{2}) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field "E" between the plates with distance "
In a region, the potential is represented by V(x,y,z) = 6x - 8xy - 8y + 6yz, where V is in volts and x, y, x are in metres. The electric force experienced by a charge of 2 coulomb situated at point (1, 1, 1) is:
N
30 N
24 N
4 N
A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are:
zero and
and Zero
and
Both are zero
The given graph represents V - I Characteristic for a semiconductor device.
Which of the following statement is correct?
It is V - I Characteristic for solar cell where, point A represents open circuit voltage and point B Short circuit current.
It is a for a solor cell and point And B represent open circuit viltage and current respectively.
It is a for a photodiode and poins A and B represent open circuit voltage and current respectively.
It is a for a LED points And B represent open circuit voltage and short circuit current respectively.
A transformer having efficiency of 90% is working on 200V and 3kW power supply. If the current in the secondary coil is 6A, the voltage across the secondary coil and the current in the primary coil respectively are:
300V, 15A
450V, 15A
450V, 13.5A
600V, 15A
A thin semicircular conducting ring (PQR) of radius 'r' is falling with its plane vertical in a horizontal magnetic field B, as shown in figure. The potential difference developed across the ring when its speed is v, is:
zero
and P is at higher potential
and R is at higher potential
2rBv and R is at higher potential
Light with an energy of falls on a perfectly reflecting surface at normal incidence. If the surface area is 15 , the average force exerted on the surface is:-
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. the work functionof the metal is:
0.65 eV
1.0 eV
1.3 eV
1.5 eV
Two cities are 150km apart. Electric power is sent from one city to another city through copper wires. the fall of potential per km is 8 volt and the average resistance per km is 0.5. The power loss in the wires is:
19.2W
19.2kW
19.2J
12.2kW
The resistance in the two arms of the meter bridge are 5 and R, respectivilty. When the resistance R is shunted with an equal resistance, the new balance point is at . The resistance 'R' is:
10
15
20
25
See the electric circuit shown in the figure.