ELECTRICITY & MAGNETISM
a) Which parameter is distributed in series connection?
b)Which parameter is distributed in parallel connection?
Potential
Current
a) To which group does a P type semi conductor belongs to?
b) To which group does N type semi conductor belongs to?
13 or ||| A group
15 or V A group
Units of Angular Accerlation is _______
rad/s2
The Waves in which the particle of the medium Vibrate at a right angle to the direction of waves motion is known as_____________
Transverse waves
Mypoyia can be corrected with the help of ________ lens.
Concave lens
Wheat stone bridge is said to be balanced when the deflection in Galvanometer is __________
Zero
Relation between Temperature and Conductivity in semi conductor is
directly proportional
G ∝ T
When a particle moves along a circular path with uniform velocity , the tangential accerlation is _______
zero
The ratio of two Specific heats of air is equal to
1.41
Sign of magnitude of a convex lens is
either positive or negative
SI units of Resistivity & Conductivity are ________ and ___________
ohm-meter (Ω⋅m) and
1/ohm-meter (Ω⋅m)-1
Radioactive Nuclie X and Y disintegrate into Z with half lives t0 and 2t0 respectively. Initial number of both X and Y = N0 .Time at which rates of disintegration of X and Y are equal, number of nuclie of Z is
a) 3N0/4 b) N0/4 c) 5N0/4 d) 7N0/4
c) 5N0/4
The distance, between the point of projection and point where the projectile strikes the ground is known as _______.
Range
The pressure of a gas in terms of Q its mean Kinetic energy per unit volume E is equal to
2E/3
Name of an optical instrument which is used to see erect image of distinct object is?
Telescope
Inside a battery,work has to be done to bring positive charge from lower potential to higher potential.which influence makes current flow from lower to higher potential (inside a battery)?
Electromagnetic Force
When an electro-magnetic radiation is incident on the surface of metal, maximum Kinetic energy of Photoelectron depends on :
a)frequency b)intensity c) both a & b d)polarization
a) frequency
If two bodies of masses m1 and m2 (m1 > m2) have equal kinetic energies, the momentum of boby m1 is _______ the momentum of body m2.
A) equal to B) less than C) greater than D) none
C) Greater than
What is the RMS speed of the oxygen molecules at 270c temperature?
484 m/s
what happens to a focal length of a convex lens, when it is immersed in water?
Increased
Main difference between Voltmeter and Potentiometer is _________
Voltmeter is used to measure voltage wheras Potentiometer is used to measure emf or internal resistance of unknown source.
A particle of mass M at rest decays into two particles of masses m1 and m2, having non zero velocities . The ratio of the de Broglie wavelengths of the particles, λ1/λ2 is :
a) m1/m2 b) m2/m1 c) 1:1 d) √m2 / m1
c) 1:1
Centre of gravity of a solid cone lies on axis at _________ height of the axis.
A) One third B) one fifth C) 1/2 D) one fourth
D) one fourth
Relation between the Amplitude and Intensity of the waves is __________
I ∝ A2
Light year is unit of________.
Distance