Physics-
General
Easy
Question
In a photoelectric experiment the relation between applied potential difference between cathode and anode V and the photoelectric current I was found to be shown in graph below. If Planck’s constant 
, the frequency of incident radiation would be nearly 
The correct answer is:
For photoelectric effect,
Related Questions to study
physics-
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers Each transformer has two coils of wire electrically insulated from each other but wound around a common core of ferromagnetic material The two wires are close together but do not touch each other.
The primary coil is connected to a source of alternating (AC) current The secondary coil is connected to a resistor such as a light bulb The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material This in turn induces an oscillating voltage and AC current in the secondary coil Student collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers
The primary coil of a transformer has 100 turns and is connected to a 120V AC source How many turns are in the secondary coil if there is a 2400 V across it
A physics lab is designed to study the transfer of electrical energy from one circuit to another by means of a magnetic field using simple transformers Each transformer has two coils of wire electrically insulated from each other but wound around a common core of ferromagnetic material The two wires are close together but do not touch each other.
The primary coil is connected to a source of alternating (AC) current The secondary coil is connected to a resistor such as a light bulb The AC source produces an oscillating voltage and current in the primary coil that produces an oscillating magnetic field in the core material This in turn induces an oscillating voltage and AC current in the secondary coil Student collected the following data comparing the number of turns per coil (N), the voltage (V) and the current (I) in the coils of three transformers
The primary coil of a transformer has 100 turns and is connected to a 120V AC source How many turns are in the secondary coil if there is a 2400 V across it
physics-General
physics-
At resonance, VL and VC are both very much greater than the applied potential, V itself The quality factor for an LCR circuit in resonance is given by 
In practice
has been achieved
At resonance, the capacitor has been adjusted for
At resonance, VL and VC are both very much greater than the applied potential, V itself The quality factor for an LCR circuit in resonance is given by In practice has been achieved
At resonance, the capacitor has been adjusted for
physics-General
physics-
In the circuit diagram shown, 
The effective current through the source is
In the circuit diagram shown, The effective current through the source is
physics-General
physics-
For the circuit shown in the figure the rms value of voltages across R and coil are E1 and E2 , respectively
The power (thermal) developed across the coil is
For the circuit shown in the figure the rms value of voltages across R and coil are E1 and E2 , respectively
The power (thermal) developed across the coil is
physics-General
physics-
The potential difference across a 2H inductor as a function of time is shown in figure At time t = 0, current is zero Current t = 2 second is
The potential difference across a 2H inductor as a function of time is shown in figure At time t = 0, current is zero Current t = 2 second is
physics-General
physics-
In the given circuit, R is a pure resistor, L is a pure inductor, S is a 100V, 50 Hz AC source, and A is an AC ammeter With either K1 or K2 alone closed, the ammeter reading is I If the source is changed to 100 V, 100 Hz, the ammeter reading with K1 alone closed and with K2 alone closed will be respectively.
In the given circuit, R is a pure resistor, L is a pure inductor, S is a 100V, 50 Hz AC source, and A is an AC ammeter With either K1 or K2 alone closed, the ammeter reading is I If the source is changed to 100 V, 100 Hz, the ammeter reading with K1 alone closed and with K2 alone closed will be respectively.
physics-General
physics-
In the given figure, the instantaneous value The of alternating e.m.f is e = 14.14 
t reading of voltmeter in volt will be.
In the given figure, the instantaneous value The of alternating e.m.f is e = 14.14 t reading of voltmeter in volt will be.
physics-General
chemistry-
Find out A,B:
Find out A,B:
chemistry-General
chemistry-
Find out V,B:
Find out V,B:
chemistry-General
chemistry-
Findout V J:
Findout V J:
chemistry-General
chemistry-
Molecular formula ofthecompoundE is:
Molecular formula ofthecompoundE is:
chemistry-General
chemistry-
The compound (D) obtained when(C)dissolves in excess of 
will be:
The compound (D) obtained when(C)dissolves in excess of will be:
chemistry-General
chemistry-
White precipitate (C) obtainedontreatmentwithaqueoussolutionof
is:
White precipitate (C) obtainedontreatmentwithaqueoussolutionof is:
chemistry-General
chemistry-
Yellow precipitate (B) is:
Yellow precipitate (B) is:
chemistry-General
chemistry-
Compound(A)is:
Compound(A)is:
chemistry-General
