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shockley brattain and bardeen won a nobel prize for what small inventionansshockley bardeen and brattain won a nobel prize for small invention of
the tesla and the gauss are units of measure of a conductanceb magnetic field strengthc magnetic fluxd electrical currentansthe tesla and gauss are
besides solid liquid and gas what is the fourth form of matteransthe fourth form of matter is
the collision between a photon and a free electron was first explained by which of the following scientistsa einsteinb heisenbergc comptond
the wave nature of light is demonstrated by which of the following a the photoelectric effectb colourc the speed of lightd diffractionansthe wave
the frequency of a wave is 50 hertz and its wavelength is 25 meters what is the velocity of this waveansthe velocity of given wave is 1250
an organ pipe which is open at both ends resonates at its fundamental frequency neglecting any end effects what wavelength is formed by this pipe in
a quarter of a wavelength is equal to how many degrees of phasea quarter of wavelength is equaivalent to 90 degrees of
a virtual image can be formed by one or more of the following single mirrors identify thema plane mirrorb concave spherical mirrorc convex spherical
when a physical property such as charge exists in discrete packets rather than in continuous amounts the property is said to bea
a standing wave is formed on a tightly stretched string the distance between a node and an antinode isw 18 wavelengthx 14 wavelengthy
the speed at which a wave propagates down a string is 300 meters per second if the frequency of this wave is 150 hertz what is the wavelength of
davisson and germer scattered electrons from a crystal of nickel the scattered electrons formed a strong diffraction pattern what important
in bohrs theory of the atom what force was responsible for holding the electrons in their orbitanscoulomb force or the force of attraction among the
a converging thin lens has a focal length of 27 centimetres an object is placed 9 centimetres from the lens where is the image of this object
the focal length of a concave mirror is 2 meters an object is positioned 8 meters in front of the mirror where is the image of this object formedans
iron is what type of magnetic material is it a diamagneticb paramagneticc ferromagneticd non-magneticansiron is ferromagnetic
a copper rod which is 1 centimetre in diameter carries a current of 5 amps the current is distributed uniformly throughout the rod the
an infinitely long wire carries a current of three amps the magnetic field outside the wirea points radially away from the wireb points radially
a charged particle is moving in a uniform magnetic field if the direction of motion of the charged particle is parallel to the magnetic field
a circuit which employs a direct current source has a branch which contains a capacitor after the circuit has reached a steady state what is the
a 10 farad capacitor is used in a circuit the voltage difference between the plates of the capacitor is 20 volts what is the magnitude of the charge
a constant potential difference is applied across the plates of a parallel-plate capacitor neglecting any edge effects the electric field inside the
for a parallel-plate capacitor with plate area a and plate separation d the capacitance is proportional to which of the followinga a divided by d
three capacitors with different capacitances are connected in series which of the following statements is true a all three of the capacitors have