A million electron are added to a pith ball. Its charge is________? April 17, 2025 by admin A. – 1.6 × 10–12 coulomb B. – 1.6 × 10–13 coulomb C. – 1.6 × 10 –18 coulomb D. – 1.6 × 10 coulomb
Two identical metal balls with charges + 2Q and – Q are separated by some distance, and exert a force F on each other. They are joined by a conducting wire, which is then removed. The force between them will now be_________? April 17, 2025 by admin A. F B. F/2 C. F/4 D. F/8
The first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________? April 17, 2025 by admin A. 320 Hz B. 640 Hz C. 160 Hz D. 480 Hz
What is the ratio of the velocity of sound at 4 atmosphere to that at 1 atmosphere? April 17, 2025 by admin A. 4 : 1 B. 1 : 1 C. 2 : 1 D. 1 : 2
The internal energy of the system increases__________? April 17, 2025 by admin A. in adiabatic expansion B. in adiabatic compression C. in isothermal expansion D. in isothermal compression
A football is kicked at 45 degrees with horizontal with K.E of E. Its K.E. at highest point is April 17, 2025 by admin A. Zero B. E/2 C. E D. E/(2)1/2
An object travels at constant speed around a circle of radius 1.0 m in 2.0 seconds. What is the magnitude of its acceleration? April 17, 2025 by admin A. 0 B. π2 C. 2 π2 D. 4 π2
A ball is thrown towards the earth and bounce back. During this process: April 17, 2025 by admin A. Direction of velocity and acceleration changes B. Direction of Displacement and acceleration changes C. Direction of Displacement and Velocity changes D. Direction of Displacement, Velocity and acceleration changes
Potential energy means? April 17, 2025 by admin A. Due to position of object B. Due to motion of object C. Due to gravity D. None of these
Tick the correct statement_________________? April 17, 2025 by admin A. Moderators slow down the neutrons B. Moderators bring the neutrons to rest C. Moderators absorb the neutrons D. Moderators reflect the neutrons
