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Practice Test - Physics 11
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Question 1
A bullet is fired at a plank of wood with a speed of 200 ms–1. After passing through the plank, its speed reduces to 180 ms–1. Another bullet, of the same mass and size but moving with a speed of 100 ms–1 is fired at the same plank. What would be the speed of this bullet after passing through the plank? Assume that the resistance offered by the plank is the same for both the bullets?
Question 2
Figure here shows P and Q as two equally intense coherent sources emitting radiations of wavelength 20m. The separation PQ is 5.0 m and phase of P is ahead of the phase of Q by 90o. A, B and C are three distant points of observation equidistant from the mid-point of PQ. The intensity of radiations at A, B, C will bear the ratio
Question 3
A formula is given as 
where P = pressure
k = Boltzmann’s constant;
θ = Temperature; t = Time
‘a’ and ‘b’ are constants. Dimensional formula of ‘b’ is same as
where P = pressure
k = Boltzmann’s constant;
θ = Temperature; t = Time
‘a’ and ‘b’ are constants. Dimensional formula of ‘b’ is same as
Question 4
Two cylinders A and B fitted with massless pistons contain equal amounts of an ideal diatomic gas at 300K. The piston A is free to move, while that of B is held fixed. The same amount of heat is given to the gas in each cylinder. If the rise in temperature of the gas in A is 30K, then rise in temperature of the gas in B is
Question 5
Three rods made of same material and having the same cross-section have been joined as shown in figure. Each rod is of the same length. The left and right ends are kept at 0 °C, 90 °C & 60 °C. The temperature of the junction of the rods will be
Question 6
A system of binary stars of masses mA and mB are moving in circular orbits of radii rA and rB respectively. If TA and TB are the times periods of masses mA and mB respectively then,
Question 7
A full wave rectifier circuit is operating from a 50 Hz source frequency, then the frequency obtain in ripple action will be
Question 8
The value of focal length of a spherical mirror from the following observations. Object distance 
cm and image 
cm is
cm and image cm isQuestion 9
A uniform rod of length 
is suspended about one of its ends. The time period of oscillation for small angular displacements is
Question 10
Two wires are placed at (2, 0, 0) and (–2, 0, 0) carrying equal currents along negative z-axis. The magnetic field at point (0, 2, 0) is along
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Apr 11JEE & BITSAT
