Q.1
##### Consider the following two statement Statement A: If heat is added to the system,it temperature must increase Statement B: If dW >0 then dV >0 Which of the below is correct option
• A & B both are correct
• A is correct only
• B is correct only
• A &B both are wrong
Q.2
• One
• Two
• Three
• Four
Q.3
##### There are two statement about Ideal gases Statement A: The $V_{rms}$ of gas molecules depends on the mass of the gas molecule and the temperature Statement B : The $V_{rms}$ is same for all the gases at the same temperature which one of the following is correct
• A & B both are correct
• A is correct only
• B is correct only
• A &B both are wrong
Q.4
##### A metallic sphere has a cavity of diameter D at its center.If the sphere is heated,the diameter of the cavity will
• Decrease
• Increase
• Remain unchanged
• None of the above
Q.5
• 15
• 30
• 45
• 60
Q.6
• 5.20 m
• 4.33 m
• 2.60 m
• 8.66 m
Q.7
##### A transverse wave in a medium is described by the equation $y=A sin^2(\omega t-kx)$. The magnitude of the maximum velocity of particles in the medium is equal to that of the wave velocity.if the value of A is
• $\frac {\lambda}{2 \pi}$
• $\frac {\lambda}{4 \pi}$
• $\frac {\lambda}{ \pi}$
• $\frac { 2 \lambda}{ \pi}$
Q.8
• -Q/2
• Q/2
• Q/4
• -Q/4
Q.9
• 24 N
• 74 N
• 15 N
• 49 N
Q.10
##### A block of mass M is pulled along a horizontal friction surface by a rope of mass m. If a force P is applied at the free end of the rope, the force exerted by the rope on the block is
• $\frac {Pm}{m+M}$
• P
• $\frac {PM}{m+M}$
• $\frac {Pm}{M-m}$
Q.11
• 2a
• b
• c
• 2a+b
Q.12
##### A particle moves such that $x=a sin \omega t$ and $y =b cos \omega t$ what is the trajectory of the particle?
• Eclipse
• circle
• straight line
• parabola
Q.13
##### A line source emits a cylindrical wave.if the medium absorbs no energy,the amplitude will vary with distance y from the source as proportional to
• $y^{-1}$
• $y^{-2}$
• $\frac {1}{ \sqrt {y}}$
• $\sqrt {y}$
Q.14
##### find the maximum attainable temperature of ideal gas when gas undergoes through the process $P=P_0-aV^2$
• $\frac {2P_0}{3R} \sqrt { \frac {P_0}{3a}}$
• $\frac {2P_0}{R} \sqrt { \frac {P_0}{3a}}$
• $\frac {P_0}{R} \sqrt { \frac {P_0}{a}}$
• $\frac {P_0}{R} \sqrt { \frac {P_0}{2a}}$
Q.15
• 4 m/s2
• 2 m/s2
• 3 m/s2
• 1 m/s2
Q.16
##### which of these is not true for adiabatic process ?
• dQ=0
• dU+dW=0
• dT=0
• Molar specific heat is zero
Q.17
##### which of these is inertial frame of reference?
• A observer in car slowing down
• A observer in train speeding up
• A observer in car in uniform circular motion
• A observer in cycle moving with constant velocity.
Q.18
##### Find the number of electrons in 5 Coulomb?
• $31.25 \times 10^{18}$
• $31.5 \times 10^{18}$
• $31 \times 10^{18}$
• $32.25 \times 10^{18}$
Q.19
##### Consider the following two statement Statement A: Work done in a closed loop by electrical force is zero Statement B:The force on one charge due to another charge is not affected by the presence of other charges near by. Which of the below is correct option?
• A & B both are correct
• A is correct only
• B is correct only
• A & B both are wrong
Q.20
##### What is not true of uniform circular motion ?
• Centripetal force=$\frac {mv^2}{R}$
• angular velocity=$\frac {v}{r}$
• angular acceleration >0
• Speed is constant
Q.21
##### An circular coil of radius R consists of N turns of wire.The current in the wire is I.Let B is the magnetic field at the center of the coil Which of the following is true
• $B= \frac {\mu _0NI}{R}$
• $B= \frac {\mu _0I}{2R}$
• $B= \frac {\mu _0NI}{4R}$
• none of these
Q.22
##### A hollow metal sphere of radius 10 cm is charged such that potential on its surface is 10 V Four statement are stated STATEMENT -1: The Potential at the center is 10 V STATEMENT -2: All the charged reside at the outer surface STATEMENT -3: Potential at a point 5 cm away from the surface is 10 V STATEMENT -4: Potential at a point 5 cm from the center of the sphere is 10 V which one of the following is correct
• All the statement are correct
• Statement 1,2 and 4 are correct
• Statement 1,2 and 3 are correct
• Statement 2,3 and 4 are correct
Q.23
##### A spring weighing machine inside a stationary lift read W N weight when a stone is kept on it.What will be the reading when the lift start moving downward with acceleration a
• $W(1- \frac {a}{g})$
• $W(1 + \frac {a}{g})$
• W
• none of these
Q.24
• 17.89 m/s
• 19.89 m/s
• 16.91 m/s
• 17 m/s
Q.25
##### An electron(charge = $1.6 \times 10^{-19}$ C) moves with a speed $2 \times 10^6$ m/s along the positive x- direction in a magnetic Field B=(i-3j-4k) tesla. Force experienced by the electron in Newton
• $1.6 \times 10^{-12}$ N
• $1.4 \times 10^{-12}$ N
• $1.6 \times 10^{-13}$ N
• $1.2 \times 10^{-12}$ N
Q.26
##### Boyle's law is an example of a ?
• Latent Heat Process
• Isothermal Process
• Isochoric Process
Q.27
##### According to Kirchhoff's Ist  law ,the algebraic sum of the currents flowing towards a branch point is
• greater then zero
• equal to zero
• greater or less than zero
• less than zero
Q.28
• 1/2
• 3/2
• 2
• 5/2
Q.29
• 7
• 4
• 3
• 10
Q.30
##### A particle is moving in the x-y plane with $x=at$ $y=bt^2$ where a and b are constant Find the trajectory of the particle?
• Parabola
• Circle
• Straight line
• none of these