Rutherford’s alpha particle scattering experiment established that:
Rutherford’s alpha particle scattering experiment established that protons are not evenly distributed throughout an atom.
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Rutherford’s experiments on scattering of alpha particles proved that:
Rutherford’s experiments on scattering of alpha particles proved that atom is mostly empty.
According to Rutherford, the atom consists of the following two parts:
According to Rutherford, the atom consists of electrons and protons.
Power in an ac circuit is equal to
Power in an ac circuit is equal to Instantaneous voltage X Instantaneous current.
Angle of dispersion depends on
The angle of dispersion depends on a) Angle of the prism. b) The material of the prism. c) The wavelength... View Article
In a series LCR what will be phase difference between voltage drop across inductor and capacitor
In a series LCR what phase difference between voltage drop across inductor and capacitor is 180 degrees.
The only component that dissipates energy in ac circuit is:
The only component that dissipates energy in ac circuit is the resistor.
When number of identical cells, in parallel combination are increased, the voltage of the circuit will
The voltage of the circuit will remain same when numbers of cells in parallel are increased.
Ac and dc both can be measured by
Ac and dc both can be measured by hot-wire instruments. Hotwire instrument uses the heating effect of current for measuring... View Article
In the series LCR circuit at resonance the applied ac voltage is 220V. The potential drop across the inductance is 110 V. what is the potential drop across the resistance?
At resonance, the net potential fall across L and C is zero. So whole of the potential drop is across... View Article
The impedance vector, in a vector-impedance diagram, is parallel to X-axis. The circuit is:
The impedance vector, in a vector-impedance diagram, is parallel to X-axis. The circuit is purely resistive.
Virtual value or effective value of a.c. is
Virtual value or effective value of a.c. is 0.707Io
An a.c. circuit has a very small band width. The resistance of the circuit should be:
An a.c. circuit has a very small band width. The resistance of the circuit should be low.
What is the relationship between Em and Eo
Em=-0.637 Eo
Through which of the ac circuit elements both the e.m.f. and current are in phase?
For a resistive circuit, e.m.f. and current are in phase.
What will be the reading of a d.c. ammeter in an a.c. circuit where the current flowing is 4A
The ordinary d.c. ammeter cannot measure a.c. currents. They record 0 reading when they are used in a.c. circuits because... View Article
The average power/cycle associated with inductor is
The average power/cycle associated with inductor is zero.
In an a.c. circuit containing inductance only
In an a.c. circuit containing inductance only I lags E by 90 degrees.
In inductance there is opposition to the growth of current, it is due to
In inductance there is opposition to the growth of current, it is due to Self induced e.m.f.
What is the dimensional formula of time period?
The dimensional formula is defined as the expression of the physical quantity in terms of its basic unit with proper dimensions. The dimensional... View Article
