A radioactive nucleus decays by two different processes
A radioactive nucleus decays by two different processes. The half-life for the first process is 10 s and that for... View Article
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A parallel plate capacitor has a plate of length l
A parallel plate capacitor has a plate of length ‘l’, width ‘w’ and separation of plates is ‘d’. It is... View Article
In the circuit shown, charge on the 5μF capacitor is
In the circuit shown, charge on the 5μF capacitor is: 1) 5.45 μc 2) 18.00 μc 3) 10.90 μc 4)... View Article
A galvanometer is used in the laboratory for detecting the null point in electrical experiments. If on passing a current of 6 mA it produces a deflection of 2°, its figure of merit is close to:
1) 6 × 10–3 A/div. 2) 3 × 10–3 A/div. 3) 666° A/div. 4) 333° A/div. Answer: (2) Figure of... View Article
In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found to be n times the initial pressure. The value of n is:
1) 32 2) 1 / 32 3) 326 4) 128 Answer: (4) PVγ = constant p (⍴-γ) = constant p1(ρ1-γ)... View Article
Two Zener diodes (A and B) having breakdown voltages
Two Zener diodes (A and B) having breakdown voltages of 6 V and 4 V respectively, are connected as shown... View Article
An infinitely long straight wire carrying current I
An infinitely long straight wire carrying current I, one side opened rectangular loop and a conductor C with a sliding... View Article
The velocity (v) and time (t) graph of a body in a straight line motion is shown in the figure
The velocity (v) and time (t) graph of a body in a straight line motion is shown in the figure.... View Article
In the circuit, given in the figure currents
In the circuit, given in the figure currents in different branches and the value of one resistor are shown. Then... View Article
Two different wires having lengths L1 and L2
Two different wires having lengths L1 and L2, and respective temperature coefficient of linear expansion ɑ1 and ɑ2, are joined... View Article
A spaceship in space sweeps stationary interplanetary dust.
A spaceship in space sweeps stationary interplanetary dust. As a result, its mass increases at a rate [dM (t)] /... View Article
Ten charges are placed on the circumference of a circle of radius R
Ten charges are placed on the circumference of a circle of radius R with constant angular separation between successive charges.... View Article
In an experiment to verify Stokes law
In an experiment to verify Stokes law, a small spherical ball of radius r and density falls under gravity through... View Article
The correct match between the entries in column I and column II are
The correct match between the entries in column I and column II are: I II Radiation Wavelength (a) Microwave (i)... View Article
A ring is hung on a nail. It can oscillate, without slipping or sliding
A ring is hung on a nail. It can oscillate, without slipping or sliding (i) in its plane with a... View Article
The total number of coordination sites in ethylenediaminetetraacetate (EDTA4–) is
Solution: (6) EDTA4– is hexadentate ligand. The total number of coordination sites in ethylenediaminetetraacetate is 6.
An oxidation-reduction reaction in which 3 electrons are transferred has a ΔGº of 17.37 kJmol–1 at 250C. The value of E0cell (in V) is ______ × 10–2. (1 F = 96,500 C mol–1)
Solution: (6) ΔG° = –nFE° 17.37 × 1000 = –3 × 96500 × E° E° = 17370/(3×96500) E° = 579/9650... View Article
A soft drink was bottled with a partial pressure of CO2
A soft drink was bottled with a partial pressure of CO2 of 3 bar over the liquid at room temperature.... View Article
The number of chiral carbon(s) present in piptide, Iie-Arg-Pro, is
Solution:(4) The number of chiral carbons is 4.
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is
Solution: Total required mol of O2 = 5 + 13 = 18
